SignalQuest, Inc. v. Chou et al

Filing 124

MEMORANDUM ORDER: For the reasons stated, the court adopts constructions of the disputed claim terms as outlined; denying 112 Motion for Reconsideration re 111 Order on Motion for Summary Judgment. So Ordered by Chief Judge Joseph N. Laplante.(jb) Modified on 6/13/2016 to add denial of motion for reconsideration text (jb).

UNITED STATES DISTRICT COURT
DISTRICT OF NEW HAMPSHIRE
SignalQuest, Inc.
v.

Civil No. 11-cv-392-JL
Opinion No. 2016 DNH 099

Tien-Ming Chou,
OneQue Corporation, and
Bravotronics Corporation
MEMORANDUM ORDER
The parties to this patent infringement action dispute the
construction of the claims in three reissued patents for an
omnidirectional tilt and vibration switch.

Plaintiff and

counterclaim defendant SignalQuest commenced this action seeking
declaratory judgment that its products did not infringe
defendant Ten-Ming Chou’s U.S. Patent No. 6,706,979.1

It later

amended its complaint to assert the three related patents in
question here -- United States Patent Nos. 7,067,748C1,
7,326,866C1, and 7,326,867C1 (collectively, the “SignalQuest
patents”) -- against defendants and counterclaimants OncQue
Corporation, Bravotronics Corporation, and Chou, who is an
officer of both companies.

This court has subject-matter

The court construed the claims of the ‘979 patent in a
previous order. See document no. 75.
1

jurisdiction over this action pursuant to 28 U.S.C. §§ 1338(a)
(patents) and 1331 (federal question).
The SignalQuest patents were granted originally on June 27,
2006, and February 5, 2008.

They claim an omnidrectional tilt

and vibration sensor, which can be used to switch an electrical
circuit ON or OFF.

Tilt the sensor one way, and a free-moving

conductive element comes in contact with two terminals,
completing a conductive path and turning the circuit ON; tilt it
another way, and the conductive element moves out of contact
with one or both of the terminals, disrupting the conductive
path and turning the circuit OFF.
After SignalQuest amended its complaint to accuse the
defendants of infringing these patents, the USPTO instituted an
ex parte reexamination at the defendants’ request.

This court

stayed the instant action as to these patents while the USPTO
reexamined them.

All three patents ultimately reissued in

October 2014, though SignalQuest cancelled some claims, rewrote
or amended others, and added still other claims in the process.
The court lifted the stay after the patents reissued and held a
hearing on the parties’ proposed claim constructions on January
26, 2016.2

At the same time, the court also heard the parties’
arguments on defendants’ motion for summary judgement, which the
2

2

The parties differ over the meanings of a number of terms
that appear in several claims of the SignalQuest patents.

After

reviewing the parties’ submissions and conducting a hearing in
accordance with Markman v. Westview Instruments, Inc., 517 U.S.
370, 388 (1996), the court construes the disputed claim terms as
set forth below.
Applicable legal standards
“[A] patent claim is that ‘portion of the patent document
that defines the scope of the patentee's rights.’”

Teva Pharm.

USA, Inc. v. Sandoz, Inc., 135 S. Ct. 831, 835 (2015).

The

proper construction of a patent’s claims is a question of law,
albeit one with “evidentiary underpinnings,” that falls
“exclusively within the province of the court.”
(quoting Markman, 517 U.S. at 372).

Id. at 837-38

“[T]he words of a claim are

generally given their ordinary and customary meaning,” i.e.,
“the meaning that the term would have to a person of ordinary

court ultimately denied. See document no. 111. The defendants
have moved the court to reconsider that decision. See document
no. 112. The court is not persuaded that it committed a
manifest error of law in concluding, based on Halo Elecs., Inc.
v. Pulse Elecs. Inc., 769 F.3d 1371, 1381 (Fed. Cir. 2014) and
Transocean Offshore Deepwater Drilling, Inc. v. Maersk
Contractors USA, Inc., 617 F.3d 1296, 1309 (Fed. Cir. 2010),
that the location of a sale or offer for sale under 35 U.S.C.
§ 271 is not limited to the location where title transfers.
Accordingly, the defendants’ motion is denied.
3

skill in the art in question at the time of the invention.”
Phillips v. AWH Corp., 415 F.3d 1303, 1312-13 (Fed. Cir. 2005)
(en banc) (quotation marks omitted).

The court may depart from

the claim’s plain meaning under limited circumstances, such as
when the patentee acts as his own lexicographer, id. at 1316-17,
or clearly disclaims or disavows the claim’s scope in the
specification or during prosecution, id. at 1317.
The court does not perform this analysis in a vacuum, but
construes the claim terms in the context of the intrinsic
record, that is, the claims themselves, the patent
specification, and the prosecution history.

Id. at 1313-14.

At

the same time, “[w]hen consulting the specification to clarify
the meaning of claim terms, courts must take care not to import
limitations into the claims from the specification.”
Labs. v. Sandoz, 566 F.3d 1282, 1288 (Fed. Cir. 2009).

Abbott
Though

“less significant than the intrinsic record” to this inquiry,
the court may also “rely on extrinsic evidence, which consists
of all evidence external to the patent and prosecution history,
including expert and inventor testimony, dictionaries, and
learned treatises.”

Phillips, 415 F.3d at 1317 (quotation marks

omitted).

4

Analysis
The parties dispute the meaning of 19 terms as they appear
in several independent and dependent claims across all three
SignalQuest patents.3

The court resolves those disagreements as

follows, construing certain terms together as the parties
proposed or as seems appropriate to the court.
A.

“Diameter” terms

The parties dispute the construction of the terms
“diameter,” “first diameter,” and “second diameter.”

These

terms appear in, for example, claim 22 of the ‘748 patent, which
recites, among other limitations:
a first electrically conductive element having a first
diameter on a proximate portion of the first
electrically conductive element and a second diameter
on a distal portion of the first electrically
conductive element, where the second diameter is
smaller than the first diameter . . . .
Drawing on the expertise of Merriam-Webster, SignalQuest
proposes that “diameter” should be construed as “the distance

While the specifications of the three related SignalQuest
patents are not identical, they are quite similar. Neither
party contends that differences in the specifications bear on
the construction of the claim terms at issue here -- reasonably
so, as the specifications appear to the court to be
substantively identical in those particulars relied on by the
parties and relevant to the terms at issue. The court draws its
examples from the specification of the ‘748 patent.
3

5

through the center of something from one side to the other,” and
that “[a] first diameter is different from a second diameter in
the claims.”

The defendants request that all three of these

terms be construed to cover “any diameter, inside or outside.”
Finding the plaintiff’s definition of “diameter” to comport with
the intrinsic evidence, the court adopts it as the meaning of
that term.
The parties do not disagree that a shape’s diameter is the
measurement of a line drawn from one side of a shape -- often,
but not necessarily, a circle -- to another, running through the
center.4

Rather, they dispute its scope.

O2 Micro Int'l Ltd. v.

Beyond Innovation Tech. Co., 521 F.3d 1351, 1362-63 (Fed. Cir.
2008) (Markman requires district courts to resolve disputes
between the parties as to claim terms’ meaning or scope).
Specifically, the defendants contend that SignalQuest’s proposed
construction would limit the measurement to the “outside”
diameter -- that is, the distance measured through the center
from one external surface to the other.

Accordingly, defendants

argue, the court ought to clarify that the diameters of the
elements recited in the claims of the SignalQuest patents may be

The defendants agreed to this much of the plaintiffs’
definition of the term “diameter.” See Defendants’ Reply Brief
(document no. 101) at 1-2.
4

6

measured from one internal surface to another (an “inside”
diameter) or from one external surface to another (an “outside”
diameter) -- and that the term “diameter” as used in the
SignalQuest patents encompasses both of these measurements.
In support of their proposed definitions, both parties
point to Figure 2 of the ‘748 patent and the accompanying
written description.

Defendants contend that D3 in this figure describes an “inside”
diameter of the distal portion of the first end cap, whereas D2
7

and D1 describe the “outside” diameters of the distal and
proximate portions, respectively.

As SignalQuest points out,

the specification distinguishes between D2, the diameter of the
distal portion, and D3, the diameter of the “cylindrical gap,”
which is, itself, “located central to the distal portion of the
first end cap.”

Id. at 4:66-5:7.

The specification further

describes the distal portion as containing an “inner surface,
the diameter of which is equal to or smaller than the diameter
D3 of the cylindrical gap.”

Id. at 5:26-30.

a similar layout for the second end cap.
id. at 6:14-44.

Figure 4 reflects

See, e.g., id. fig. 4;

Accordingly, when invoking the term “diameter,”

the specification indicates which portions of which elements
should be measured.

The claims do likewise.

E.g., id. at

claims 22, 32, 43, 55.
Neither the claims nor the specification refer to an
“inside” or “outside” diameter but rather, as these references
make clear, describe the diameters of specific elements of the
sensor.

None of the intrinsic evidence here suggests that the

patentee intended to depart from the traditional, geometric
definition of the term.

Cf. SkinMedica, Inc. v. Histogen Inc.,

727 F.3d 1187, 1203-04 (Fed. Cir. 2013) (redefinition requires
at least implicit disclaimer of plain and ordinary meaning).
Accordingly, the court adopts the plaintiff’s proposed
8

construction as the plain and ordinary meaning of the term
“diameter.”
As for the “first diameter” and “second diameter” terms,
using “first” and “second” “is a common patent-law convention to
distinguish between repeated instances of an element or
limitation.”

3M Innovative Properties Co. v. Avery Dennison

Corp., 350 F.3d 1365, 1371 (Fed. Cir. 2003).
appears to have done so here.

The patentee

As an example, claim 22 of the

‘748 patent recites a “a first electrically conductive element
having a first diameter on a proximate portion [of that element]
and a second diameter on a distal portion [of that element],
where the second diameter is smaller than the first diameter.”
Other claims also recite a “first diameter” and “second
diameter” in similar manner.

See, e.g., ‘748 patent claims 43,

55; ‘866 patent claims 20, 28, 42; ‘877 patent claims 26, 46,
49.

The claim language is thus unambiguous that the “first

diameter,” the diameter of the proximate portion of the
electrically conductive element, is distinct from the “second
diameter,” the diameter of the distal portion of that element.
Under the plain language of the claims, the second diameter must
be smaller than the first.
The court accordingly construes the claim language to mean
that the “first diameter” is distinct from the “second
9

diameter.”

The court need not read the first and second

diameters’ respective lengths into that constructions; the
claims themselves do so with sufficient clarity.
B.

“Electrically conductive element”

The parties also dispute the meaning of the term
“electrically conductive element.”
patent is illustrative.

Again, claim 22 of the ‘748

It recites, among other limitations, a

sensor having:
a first electrically conductive element having a first
diameter on a proximate portion of the first
electrically conductive element and a second diameter
on a distal portion of the first electrically
conductive element, where the second diameter is
smaller than the first diameter;
a second electrically conductive element having a
first diameter on a proximate portion of the second
electrically conductive element and a second diameter
on a distal portion of the second electrically
conductive element, where the second diameter is
smaller than the first diameter . . . .
SignalQuest asks the court to construe this term as “an element
able to conduct electricity.”

The defendants seek a

construction that incorporates this meaning (“any object that
conducts electricity across the object”) but also adds the
limitation that “all parts of element need not be entirely
conductive.”

In short, the parties differ over whether the

electrically conductive element as claimed in SignalQuest’s
patents need be entirely conductive.
10

Finding no support in the

intrinsic evidence or the evidence presented for limiting the
claim as requested by the defendants, the court adopts the
plaintiff’s proposed construction:

“an element able to conduct

electricity.”
This construction is supported by the specification.

It

describes the sensor as containing “an electrically conductive
element embodied as the first end cap, . . . [and] a second
electrically conductive element embodied as the second end cap .
. . .”

‘748 patent at 4:14-18.

The specification is not devoid

of guidance as to the composition of the electrically conductive
end caps.

It suggests that they “may be constructed from a

composite of high conductivity and/or low reactivity metals, a
conductive plastic, or any other conductive material.”
4:23-26; 6:10-13.

Id. at

The specification further explains that this

element’s “main function” is to “to provide a connection to
allow an electrical charge introduced to the first end cap to
traverse the conductive spheres and be received by the second
end cap . . . .”

Id. at 4:52-55.

In order to perform that

function, the element in question must be conductive -- that is,
able to conduct electricity.

Id. at 4:56-58 (“[M]any different

shapes and sizes of end caps may be used as long as the
conductive path is maintained.”).
agreed at oral argument.
11

On this much, the parties

They disagree about whether every part of the electrically
conductive elements must necessarily be made of a conductive
material.

As defendants point out, nothing in the description

recited above explicitly requires as much.

But the converse is

equally true: this description also does not explicitly state
that something less than every part of this element must be made
of conductive material.

It is, in fact, silent on this point.

In the face of that silence, the court generally will not read
such a limitation into the claim language.

Renishaw PLC v.

Marposs Societa’ per Azioni, 158 F.3d 1243, 1249-50 (Fed. Cir.
1998) (a court generally will not “add a narrowing modifier
before an otherwise general term that stands unmodified in a
claim.”).
Nor does failing to do so necessarily, as defendants
suggest, “read[] in the word ‘entirely’ before electrically
conductive element.”

Defendants’ Reply (document no. 101) at 3.

Indeed, absent such an added limitation, the electrically
conductive element may be made completely of conductive
material, or it may not -- so long as it is able to conduct
electricity.

“The patentee is free to choose a broad term and

expect to obtain the full scope of its plain and ordinary
meaning unless the patentee explicitly redefines the term or
disavows its full scope.”

Thorner v. Sony Computer Entm't Am.
12

LLC, 669 F.3d 1362, 1367 (Fed. Cir. 2012).

Defendants point to

no evidence that the patentee narrowed this term.

The court,

accordingly, will “construe the claim to cover all types of that
structure that are supported by the patent disclosure,” id., and
adopts the plaintiff’s proposed construction.
C.

“Electrically insulative element”

The parties also dispute the meaning of the term
“electrically insulative element.”

This term, too, appears --

for purposes of illustration -- in claim 22 of the ‘748 patent,
which recites:
an electrically insulative element connected to the
first electrically conductive element and the second
electrically conductive element, where the distal
portion of the first electrically conductive element
fits within a proximate end of the electrically
insulative element, [and] where the distal portion of
the second electrically conductive element fits within
a distal end of the electrically insulative element. .
. .
SignalQuest proposes that this term means “an element that
prevents or reduces the transmission of electricity.”

The

defendants do not object to this meaning of the term per se, but
ask the court to add, as a further limitation, that “[i]f [the]
claims are somehow valid,” the electrically insulative element
has a “cylindrical not square exterior shape.”

They argue that

an express disclaimer during reexamination precludes SignalQuest
from claiming an electrically conductive element with a square13

shaped exterior.5

See Defendants’ Opening Claim Construction

Brief at 13-16.
During the reexamination of the SignalQuest patents, the
examiner initially objected to the claims at issue as obvious in
light of a variety of combinations of prior art.

SignalQuest

traversed that objection as to the majority of its revised
claims by submitting evidence of the commercial success of its
SQ-SEN-200 sensor, the exterior of which is in the shape of a
circular cylinder.6

SignalQuest did not submit evidence of

commercial success in support of, and thus did not traverse the
examiner’s objection to, dependent claim 14 of the ’748 patent,
dependent claim 15 of the ’866 patent, and dependent claim 16 of
the ’867 patent, each of which recited “[t]he sensor of claim 1,

The defendants first raised this estoppel argument in
their motion for summary judgment of invalidity. As the court
explained in denying that motion, this argument is better taken
up in the context of construing the claim at issue than on a
motion for summary judgment before claim construction.
SignalQuest v. Chou, 2016 DNH 35, 17-19; see also Festo Corp. v.
Shoketsu Kinzoku Kogyo Kabushiki Co., 535 U.S. 722, 733 (2002)
(“Estoppel is a rule of patent construction that ensures that
claims are interpreted by reference to those that have been
cancelled or rejected.” (internal quotations omitted)).
5

As defendants’ counsel conceded at oral argument, a
cylinder need not necessarily be circular, though the term
“cylinder” commonly brings the circular variety to mind.
6

14

wherein the electrically insulative element . . . is square-like
in shape.”
Defendants argue that this cancellation acts as a complete
disclaimer of a non-circular shaped electrically insulative
element, even as to the allowed independent claims.

At the time

it withdrew those claims, SignalQuest explained only that those
claims “have been cancelled, without prejudice, to expedite
allowance.”

E.g., Defendants’ Ex. I (document no. 99-10) at 13.

SignalQuest now explains that it did so, foregoing its appeal,
“because other claims that were allowed made no mention of shape
and therefore broadly covered all shapes, including square
shapes.”

Plaintiff’s Reply Brief (document no. 102) at 4.

The court “assess[es] whether a patentee relinquished a
particular claim construction based on the totality of the
prosecution history, which includes amendments to claims and
arguments made to overcome or distinguish references.”

Rheox,

Inc. v. Entact, Inc., 276 F.3d 1319, 1326 (Fed. Cir. 2002).
Generally, “[a] patentee who narrows a claim as a condition for
obtaining a patent disavows his claim to the broader subject
matter . . . .”

Festo Corp., 535 U.S. at 737.

Similarly,

“[w]hen the patentee makes clear and unmistakable prosecution
arguments limiting the meaning of a claim term in order to
overcome a rejection, the courts limit the relevant claim term
15

to exclude the disclaimed matter.”

SanDisk Corp. v. Memorex

Products, Inc., 415 F.3d 1278, 1286 (Fed. Cir. 2005).

In either

case, the disclaimer “must be clear and unambiguous.”

Seachange

Int'l, Inc. v. C–COR Inc., 413 F.3d 1361, 1373 (Fed. Cir. 2005).
This one is not.

SignalQuest neither narrowed a claimed

nor made a clear and unmistakable prosecution argument to
overcome the obviousness rejections.

Rather, SignalQuest

cancelled a dependent claim during reexamination.

The

defendants have not offered, and the court has been unable to
find, support for the proposition that cancellation of a
dependent claim necessarily limits the scope of an unamended
independent claim.
Furthermore, the prosecution history itself demonstrates
that an amendment reciting a specific shape would not have
overcome the examiner’s obviousness objection.

To the contrary,

the examiner rather explicitly excluded considerations
concerning the “size, shape, cost, [and] complexity” of the
sensor from the “explicit teachings of the references” that he
found rendered the claims obvious.
(document no. 99-6) at 13.

E.g., Defendants’ Ex. E

Nor did the examiner invoke the

shape of the SignalQuest SQ-SEN-200 sensor when he found the
requisite nexus between the claims and the sensor’s commercial
success.

That is, so far as the court can tell, the examiner
16

did not find that the “sales were a direct result” of the shape
of the product.

See In re Huang, 100 F.3d 135, 140 (Fed. Cir.

1996) (evidence of commercial success “is relevant in the
obviousness context only if there is proof that the sales were a
direct result of the unique characteristics of the claimed
invention”).

Nor did he need to, as the independent claims

ultimately allowed are silent as to the shape of the
electrically insulative element.

Accordingly, SignalQuest did

not clearly disclaim a square-shaped electrically insulative
element to overcome prior art or obtain the claims that were
allowed.
The defendants’ reliance on Rheox is misplaced.

In that

case, the patentee directed claim 2 of its patent for a method
of treating lead contaminated soil to using TSP as an agent and,
in claim 18, recited an agent selected from a group that
included TSP, phosphate rock, and hydroxyapatite.

After an

anticipation rejection, the patentee cancelled claim 2 and
amended claim 18 to remove the reference to TSP, explaining that
it did so to distinguish the invention from prior art.

The

Federal Circuit Court of Appeals concluded, in light of these
amendments and the patentee’s statement to the examiner, that
the patentee disclaimed use of TSP.

Rheox, 276 F.3d at 1327.

Here, as discussed supra, though SignalQuest withdrew its
17

dependent square-shaped claim in the face of an obviousness
rejection, there is no indication that it did so to overcome
that objection.

Nor is there any suggestion that the examiner

rejected SignalQuest’s claims on the basis that the prior art
taught the shape of the electrically insulative element.

To the

contrary, the examiner explained that any argument concerning
size would “not address the explicit teachings of the [prior
art] references.”

E.g., Defendants’ Ex. E (document no. 99-6)

at 13.
Finally, the fact that SignalQuest submitted evidence of
the commercial success of only a sensor with a circularly
cylinder is not dispositive here.

When traversing an

obviousness objection using evidence of commercial success, a
patentee need not introduce evidence of every conceivable
embodiment.
2011).

In re Huai-Hung Kao, 639 F.3d 1057, 1069 (Fed. Cir.

“It seems unlikely” to this court, as it does to the

Federal Circuit Court of Appeals, “that a company would sell a
product containing multiple, redundant embodiments of a patented
invention.”

In re Glatt Air Techniques, Inc., 630 F.3d 1026,

1030 (Fed. Cir. 2011).

Where, as here, the shape of the sensor

was not a factor in the obviousness analysis, SignalQuest’s
failure to submit evidence of its own square- or otherwiseshaped embodiment does not, itself, implicate a disavowal.
18

In the absence of a “clear and unambiguous” disavowal, the
court cannot conclude that SignalQuest disclaimed a squareshaped electrically insulative element by cancelling claim 14 of
the ‘748 patent, claim 15 of the ‘866 patent, and claim 16 of
the ‘867 patent.

See Genentech v. Trustees of the Univ. of

Penn., No. 10-cv-2037, 2011 WL 2259114, at *10-11 (N.D. Cal.,
May 9, 2011) (no disclaimer where prosecution history was
ambiguous as to reason for claim’s cancellation).

SignalQuest’s

proffered explanation for cancelling the claims in question is
not unreasonable, and the record here is less clear than that in
Rheox, on which defendants rely.

Accordingly, the court

construes “electrically insulative element” to mean “an element
that prevents or reduces the transmission of electricity” and
declines to import the defendants’ limitation that it be
“cylindrical not square” in shape.
D.

“Distal” and “proximate” terms

The parties further dispute the meaning and definiteness of
the terms “distal end,” “distal portion,” “distal surface,”
“proximate end,” “proximate portion,” and “proximate surface.”
As an example, independent claim 22 of the ‘748 patent invokes
the described ends and portions in the following limitations:
a first electrically conductive element having a first
diameter on a proximate portion of the first
electrically conductive element and a second diameter
19

on a distal portion of the first electrically
conductive element, where the second diameter is
smaller than the first diameter,
a second electrically conductive element having a
first diameter on a proximate portion of the second
electrically conductive element and a second diameter
on a distal portion of the second electrically
conductive element, where the second diameter is
smaller than the first diameter,
an electrically insulative element connected to the
first electrically conductive element and the second
electrically conductive element,
where the distal portion of the first electrically
conductive element fits within a proximate end of the
electrically insulative element,
where the distal portion of the second electrically
conductive element fits within a distal end of the
electrically insulative element, and
where the proximate portion of the first electrically
conductive element and the proximate portion of the
second electrically conductive element are located
external to the electrically insulative element . . .
.
The aforementioned surfaces appear in dependent claim 38 of the
‘748 patent, which recites:
[t]he sensor of claim 37, wherein the electrically
insulative element has a proximate surface and a
distal surface, wherein the proximate surface and the
distal surface are substantially parallel to each
other and at axially opposite ends of the electrically
insulative element, . . .
Invoking dictionary definitions, and in particular the
dictionaries’ general agreement that the terms “distal” and
“proximate” connote opposites, the plaintiff would have the

20

court construe the “distal” terms as “a [portion/end/surface]
opposite in location to a proximate [portion/end/surface]” and
the “proximate” terms as “a [portion/end/surface] opposite in
location to a distal [portion/end/surface].”

Also relying on

dictionary definitions, the defendants contend that these terms
are indefinite as used in the SignalQuest patents.
A claim is indefinite “if its language, when read in light
of the specification and prosecution history, ‘fails to inform,
with reasonable certainty, those skilled in the art at the time
the patent was filed about the scope of the invention.’”

Eidos

Display, LLC v. AU Optronics Corp., 779 F.3d 1360, 1364 (Fed.
Cir. 2015) (quoting Nautilus, Inc. v. Biosig Instruments, Inc.,
134 S. Ct. 2120, 2124 (2014)).

The defendants here, as “the

part[ies] challenging the patent[,] bear[] the burden of proving
invalidity by clear and convincing evidence.”

Takeda Pharm. Co.

v. Zydus Pharm. USA, Inc., 743 F.3d 1359, 1366 (Fed. Cir. 2014)
(citing Microsoft Corp. v. i4i Ltd. P'ship, 564 U.S. 91, 95
(2011)).

The defendants have not carried that burden as to

these terms.
Both parties offer similar dictionary definitions that,
they propose, would coincide with the understanding of a person
of ordinary skill in the art as to the meaning of “distal” and
“proximate.”

See Plaintiff’s Opening Claim Construction Brief
21

(document no. 100) at 9; Defendants’ Opening Claim Construction
Brief (document no. 99) at 17.

According to these dictionaries,

“distal” means “situated away from the centre of the body, or
from the point of origin . . . .”

Oxford English Dictionary,

http://www.oed.com (May 19, 2016); accord “distal,” MerriamWebster’s Collegiate Dictionary 337 (10th ed. 1998).
“Proximate,” in this context, takes on the meaning of
“proximal,”7 which means “next to or nearest the point of
attachment or orientation, central point, or the point of view.”
Merriam-Webster at 941; accord “proximal,” Oxford English
Dictionary, http://www.oed.com (May 19, 2016).

The dictionaries

invoked by both sides agree that “distal” and “proximal” are
frequently used to connote opposites.

See, e.g., Merriam-

Webster at 337, 941; “distal,” Oxford English Dictionary,
http://www.oed.com (May 19, 2016); see also Lamoureux v.
AnazaoHealth Corp., 669 F. Supp. 2d 227, 259 (D. Conn. 2009)
(finding ordinary meaning of “distal” to be “‘remote from the
point of view,’ or ‘the far’ end, the opposite of proximal”);

The court does not find persuasive the defendants’
argument that use of the term “proximate” instead of “proximal”
renders the claim term indefinite. See Defendants’ Opening
Claim Construction Brief (document no. 99) at 21. Even the
dictionary upon which the defendants rely for a definition of
“proximal” equates it with “proximate.” Merriam-Webster at 941.
7

22

EVM Sys., LLC v. Rex Med., L.P., No. 6:13-CV-184, 2015 WL
4911090, at *5 (E.D. Tex. Aug. 17, 2015) (“‘Distal end’ merely
refers to one of the two ends on a device -- i.e., opposite the
proximal end”).
The defendants contend that the terms are indefinite
because, when modifying the claimed “portions,” the SignalQuest
patents use “distal” when they should use “proximate,” and viceversa.

That is, defendants argue, the “proximate portion” of

claim 22 references the portion of the electrically conductive
elements that is away from the center of the apparatus and so
should be “distal,” while the “distal portion” of the same
references the portion of the electrically conductive elements
that is closer to the center, and so should be “proximate.”

See

Defendants’ Opening Claim Construction Brief (document no. 99)
at 17-18.

This argument presupposes that the terms “proximate”

and “distal” are construed so that the center of the entire
apparatus (not just the electrically conductive element, or some
other element) serves as the reference point from which any
portion is near or far.

As discussed above, however, the

dictionary definitions of the terms allow for other reference
points, such as a point of origin, attachment, view, or the
opposite side.

23

The lack of a specified reference point from which a
portion is “distal” or “proximate” does not condemn these terms
to indefiniteness.

The claims and specification consistently

describe the “distal portion” as having a smaller diameter than
the “proximate portion.”

See, e.g., ‘748 patent claim 22; id.

fig. 2; id. at 4:29-31, 4:66-5:1, 6:16-20, 6:36-38.

The patents

further describe the “distal portion” of the “end caps” -- the
electrically conductive elements -- as “an extension of the
proximate portion” of the same.

E.g. id. at 5:22-24, 6:60-63.

Accordingly, the court concludes, a person of ordinary skill in
the art would be able to study the disclosed device, in light of
the SignalQuest patents, and determine which portion of the
electrically conductive device is “proximate” and which is
“distal” with reasonable certainty.
The same goes for the “proximate end” and “distal end” of
the electrically insulative element.

The defendants argue that

these terms are likewise indefinite because neither the
“proximate end” nor the “distal end” of the electrically
insulative element of claim 22 is more “distal” or “proximate”
from the center than the other end.

This, again, presumes the

center of the apparatus as the relevant frame of reference.
Here, the electrically insulative element is disclosed as having
only two ends -- one “proximal” and one “distal.”
24

See, e.g.,

‘748 patent claim 22; ‘748 patent at 5:34-37.

The distal

portion of one electrically conductive element “fits within” one
of those ends; the distal portion of a second electrically
conductive element “fits within” the other. ‘748 patent
claim 22.

In this context, the patent employs the terms

“distal” and “proximal” in a manner similar to “first” and
“second,” and by them appears to merely differentiate two
identical ends of a cylindrical electrically insulative element.
See ‘748 patent figs. 1 and 3; ‘748 patent at 5:34-43.
Accordingly, the court concludes that the defendants have not
shown that the terms “distal end” and “proximal end” fail to
inform a person of skill in the art of the claims’ scope with
“reasonable certainty.”

Eidos Display, 779 F.3d at 1364 (Fed.

Cir. 2015); see also EVM Sys., 2015 WL 4911090, at *5
(concluding that, where the apparatus disclosed had only two
ends, “[a] person of ordinary skill in the part would be able to
study an apparatus in light of the '670 Patent and determine
which end is the ‘distal end’.”).
As for the “proximate surface” and “distal surface” recited
in, for example, claim 38 of the ‘746 patent, the defendants
fail to support their argument that it is “certainly impossible
to determine” which surface is which, and that invoking the
terms “distal” and “proximate” in connection with those surfaces
25

“make[s] no sense.”

Because the defendants “point[] to no

evidence showing that skilled artisans would find [these terms]
lacking reasonable certainty in . . . scope,” Apple Inc. v.
Samsung Elecs. Co., 786 F.3d 983, 1003 (Fed. Cir. 2015), the
court cannot conclude that they are indefinite.
The court therefore concludes that the terms “distal end,”
“distal portion,” “distal surface,” “proximate end,” “proximate
portion,” and “proximate surface” are not indefinite, and adopts
SignalQuest’s proposed constructions.
E.

“Surface” terms and “cylindrical lip”

The parties also dispute several terms appearing in, for
example, claims 28 and 35 of the ‘748 patent.

Several of these

terms relate to various “surfaces” of the elements of the
claimed invention, including the terms “top surface,” “outer
surface,” “bottom surface,” “single internal surface,” and “flat
end surface.”

They also dispute the term “cylindrical lip,”

which is an element defined by certain of the disputed surfaces.
The court addresses each of these terms in turn.
1.
“top surface,” “outer surface,” and “bottom
surface”
The defendants contend that the terms “top surface,” “outer
surface,” and “bottom surface” are indefinite.

SignalQuest

contends they are not, and proposes constructions.
26

The terms

appear, for example, in claim 28 of the ‘748 patent, which
recites:
The sensor of claim 22, wherein the distal portion of
the first electrically conductive element further
comprises:
a first top surface;
a first outer surface; and
a first bottom surface, wherein the first top
surface, the first outer surface, and the first
bottom surface form a first cylindrical lip of
the first electrically conductive element, and
wherein the distal portion of the second electrically
conductive element further comprises:
a second top surface;
a second outer surface; and
a second bottom surface, wherein the second top
surface, the second outer surface, and the second
bottom surface form a second cylindrical lip of
the second electrically conductive element.
In arguing that these “surface” terms are indefinite, the
defendants disassociate these terms from the claim language and
the specification.

Absent any point of reference, and invoked

in a vacuum, the terms “top surface,” “bottom surface,” and
“outside surface” mean little.

But the court construes the

claim language in the context of the claims and the
specification.

See CardSoft, (assignment for the Benefit of

Creditors), LLC v. VeriFone, Inc., 807 F.3d 1346, 1350 (Fed.
Cir. 2015) (“The person of ordinary skill in the art is ‘deemed
27

to read the claim term not only in the context of the particular
claim in which the disputed term appears, but in the context of
the entire patent,’ including the specification and the
prosecution history.” (quoting Phillips, 415 F.3d at 1313)).

A

claim term is only indefinite if, read in that context, it fails
to inform a person of skill in the art at the relevant time of
the claim’s scope.

Eidos Display, 779 F.3d at 1364.

In that

context, these terms accomplish that aim.
For example, the term “top surface” is used in the claims
to refer to a surface of the proximate portion of the
electrically conductive elements, a surface of the distal
portion of the same, and a surface of the electrically
insulative element.

E.g., ‘748 patent claims 28, 30, 35.

In

each instance, the surface described is that on the outer
circumference of a cylinder or disk.

See, e.g., id. figs. 1-4;

id. at 4:29-40 (the “top surface” of the proximate portion of
the electrically conductive element, which is shaped like a
disk, is the surface that “runs perpendicular to the flat end
surface” and the “internal surface” thereof), 5:8-14
(“Progression from the proximate portion of the first end cap to
the distal portion of the first end cap is defined by a step
where a top portion of the step is defined by the top surface of
the proximate portion, . . . and a bottom portion of the step is
28

defined by the top surface of the distal portion.”), 5:34-51
(“the top surface of the central member,” which may be “tubelike in shape,” “defines the outer surface of the central
member”).
Similarly, the claims invoke a “bottom surface” to refer to
the surface that is on the inner circumference of the distal
portion of the electrically conductive element and the
electrically insulative element -- that is, the hollow center of
both of those cylindrically-shaped elements.8
claims 28, 29, 31.
interpretation.

E.g., ‘748 patent

The specifications support this

See, e.g., id. figs. 1-4; id. at 5:1-6 (“The

bottom surface of the distal portion defines an exterior portion
of a cylindrical gap located central to the distal portion of
the first end cap”), 5:44-48 (“the bottom surface of the central
member defines a hollow center”).
Finally, the claims recite an “outer surface” of the distal
portion of the electrically conductive element.
patent claim 28.

E.g., ‘748

The specification describes this “outer

surface” as one “that joins the top surface and the bottom
surface” of that portion of the electrically conductive element.

As noted supra, a cylinder in this context need not
necessarily have a circular cross-section.
8

29

E.g., ‘748 patent at 5:15-17; see also id. figs. 2 and 4; id. at
5:24-26.
Defendants argue that these terms lack clarity because
independent claim 22, from which claim 28 depends, places that
“distal portion of the . . . electrically conductive element[s]
. . . inside the electrically insulative element.”

That is,

according to the defendants, because the surfaces of the distal
portion of the electrically conductive element are inside the
electrically insulative element, a person of ordinary skill in
the art would not understand them to be “outside,” “top,” or
“bottom” surfaces of the electrically conductive element.
Taking these terms in a vacuum, divorced from that evidence, the
court understands how defendants’ counsel may be confused by
this description of the “top surface” of the electrically
insulative element as an “outer surface.”
not recite these terms in a vacuum.

But the patentee does

As discussed above, the

intrinsic evidence consistently describes each “surface” with
respect to and relative to the structure it, in part,
circumscribes.

In the context of the patent as a whole, see

CardSoft, 807 F.3d at 1350, the court concludes that a person of
ordinary skill in the art at the time of the invention would be
able to ascertain the positions of the claimed surfaces with

30

reasonable certainty.

Therefore, the court cannot find these

terms indefinite.
At the same time, the plaintiff’s constructions, drawn from
dictionary definitions, do nothing to clarify the relative
positions of these surfaces.

Instead, they suffer from the

malady against which the Federal Circuit Court of Appeals
cautioned in Phillips, where “heavy reliance on the dictionary
divorced from the intrinsic evidence risks transforming the
meaning of the claim term to the artisan into the meaning of the
term in the abstract, out of its particular context, which is
the specification.”

415 F.3d 1321.

In the absence of a

construction from the defendants, and unconvinced by the
plaintiff’s dictionary definitions, the court exercises its
“independent obligation to determine the meaning of the claims,
notwithstanding the views asserted by the adversary parties,”
Exxon Chem. Patents, Inc. v. Lubrizol Corp., 64 F.3d 1553, 1555
(Fed. Cir. 1995), draws on the intrinsic evidence, and construes
the term “top surface” to mean “the surface of the outer
circumference,” the term “bottom surface” to mean “the surface
of the inner circumference,” and the term “outer surface” to
mean “the surface that joins the top surface and the bottom
surface.”

31

2.

“Single internal surface”

The parties also dispute the meaning of the term “single
internal surface.”

It appears, for example, in claim 35 of the

‘748 patent, which recites:
The sensor of claim 22, wherein a top surface of the
distal portion of the first electrically conductive
element and a top surface of the proximate portion of
the first electrically conductive element are
connected to each other by only a single internal
surface that is substantially perpendicular to both
the top surface of the distal portion of the first
electrically conductive element and the top surface of
the proximate portion of the first electrically
conductive element, . . . .
SignalQuest proposes that a “single internal surface” is “one
interior surface.”

Defendants propose, instead, that it means

the “[p]ortions of conductive element connected by only one
surface and that surface is covered by insulative element.”
Though the defendants propose a construction, they offer no
argument on its behalf.9

Rather, they draw on their

indefiniteness arguments as to the other “surface” terms,
arguing that use of the word “interior” with respect to this
surface is inconsistent with use of the terms “outer surface”
and “top surface” in, for example, claim 28 of the ‘748 patent.

Even if they had, defendants’ proposed construction
relates to the portions of the electrically conductive element
connected to the “single internal surface,” not that term
itself.
9

32

As discussed supra Part II.E.1, the court has rejected the
defendants’ indefiniteness argument with respect to the terms
“outer surface” and “top surface” because a person of ordinary
skill in the art, reading the claims in light of the
specification and the patent as a whole, would be able to
ascertain the positions of these surfaces with reasonable
certainty.

The court rejects defendants’ position here for the

same reason.
As with the top, bottom, and outer surface terms, the
specification describes the position of the “internal surface”
relative to both the proximate portion and distal portion of the
electrically conductive elements.

The specification describes

the “internal surface” in question as follows:

“The proximate

portion [of the end caps] also contains an internal surface
located on a side of the proximate portion that is opposite to
the flat end surface, where the top surface runs perpendicular
to the internal surface.”
26.

E.g., ‘748 patent at 4:35-39, 6:22-

It further explains:
Progression from the proximate portion of the [end
caps] to the distal portion of the [end caps] is
defined by a step where a top portion of the step is
defined by the top surface of the proximate portion, a
middle portion of the step is defined by the internal
surface of the proximate portion, and a bottom portion
of the step is defined by the top surface of the
distal portion.

33

E.g., ‘748 patent at 5:8-14, 6:45-52.

Also as with the other

surface terms, plaintiff’s proposed construction offers little
more than synonyms for the words of this term -- “one” for
“single” and “interior” for “internal.”

In the context of the

SignalQuest patents, however, the surface in question is more
specifically defined by the intrinsic evidence as “one surface
on a side of the proximate portion of the electrically
conductive element that is opposite to the flat end surface.”
The court adopts that construction.
3.

“Flat end surface”

Claim 24 recites “[t]he sensor of claim 22, wherein the
first electrically conductive element further comprises a flat
end surface located on a side opposite the distal portion of the
first electrically conductive element . . . .”

Relying

primarily on dictionary definitions of “flat” and “end,”
SignalQuest proposes that the “flat end surface” of this claim
must be “[a] boundary surface that is smooth, level, or even.”
At oral argument, the defendants agreed to this construction.
The court, accordingly, adopts it.
4.

“Cylindrical lip”

The parties initially requested that the court construe the
term “cylindrical lip,” which appears, for example, in claim 28

34

of the ‘748 patent.

At oral argument, however, counsel for the

defendants agreed that, should the court conclude that the
“surface” terms lacked ambiguity, the “cylindrical lip” is the
shape described by the top, bottom, and outer surfaces, as
recited in claim 28 of the ‘748 patent, claim 26 of the ‘866
patent, and claim 31 of the ‘867 patent.

Defendants’ counsel

also conceded that the cylindrical lip need not be “circular,”
and expressly withdrew that portion of their proposed
construction.

Plaintiff’s counsel likewise agreed that the

intrinsic evidence -- specifically, the claim language and the
specification -- defines this term with sufficient clarity.
For the reasons discussed supra Part II.E.1, the court has
concluded that the “surface” terms are not indefinite.

In light

of that determination, the defendants’ concessions and
plaintiff’s agreement appear to the court to resolve any actual
dispute between the parties as to the proper scope of the term
“cylindrical lip.”

In the absence of such a dispute, the court

need not, and accordingly does not, construe the claim term.
Cf. O2 Micro Int'l, 521 F.3d at 1362-63 (Fed. Cir. 2008)
(Markman requires district courts to resolve disputes between
the parties as to claim terms’ meaning or scope).

35

F.

“Equal in dimension”

The parties also disagree over the meaning of the term
“equal in dimension” in the context of the SignalQuest patents.
This term appears in, for example, dependent claim 26 of the
‘748 patent, which recites “[t]he sensor of claim 22, wherein
the first electrically conductive element and the second
electrically conductive element are equal in dimension.”
Plaintiff proposes that this term means that the described
elements must be “[l]ike or alike in measurable extent of some
kind, such as length, breadth, depth, or height.”

Defendants

contend that it means that “[a]ny two dimensions are the same.”
As for the term “dimension,” at oral argument, the parties
agreed that, in this context, it refers to geometric dimensions,
such as length, breadth, depth, height, etc.
supports this construction.

The specification

It explains that, in the preferred

embodiment, “dimensions of the second end cap are preferably the
same as dimensions of the first end cap,” so as to allow the
distal portions of the end caps -- the electrically conductive
elements -- “to fit within the hollow center of the central
member,” that is, the electrically insulative element.
‘748 patent at 5:44-48, 7:5-11.

E.g.,

The suggestion that the two end

caps having equal dimensions would allow a portion of both to
fit within the opposite ends of the same hollow cylinder
36

suggests that the dimensions in question are measurable and of
the geometric variety.
The term “equal” does not require a construction beyond its
plain and ordinary meaning.

SignalQuest invokes its dictionary

definition (“like or alike”) in an effort to avoid defining the
term with itself.

The defendants agreed, at oral argument, to

SignalQuest’s construction so long as “like or alike” means
“equal.”

Invoking the symmetric property of equality5 (as seems

particularly appropriate here), the court concludes that the
parties agree that “equal” means just that -- equal.
The parties’ disagreement lies, then, in whether the claim
requires the electrically conductive elements to have more than
one equal dimension.

Plaintiff suggests that the “any kind” of

the dimensions must be equal.

Defendants propose that “any two

of the dimensions” must be the same.

Finding no support for the

latter proposition in the intrinsic evidence, and the defendants
having offered none, the court declines to import this
limitation into the construction of this term.

See Thorner 669

F.3d at 1367 (“The patentee is free to choose a broad term and
expect to obtain the full scope of its plain and ordinary
meaning unless the patentee explicitly redefines the term or

If a = b, then b = a. See William T. Parry & Edward A.
Hacker, Aristotelian Logic 255 (1991).
5

37

disavows its full scope.”).

Accordingly, the court construes

the term “equal in dimension” to mean “equal in any geometric
dimension.”
G.

“Plastic”

The parties dispute the meaning of the term “plastic.”

It

appears in, for example, claim 27 of the ‘748 patent, which
claims “[t]he sensor of claim 22, wherein the electrically
insulative element is fabricated from a material selected from
the group consisting of plastic and glass.”

SignalQuest

proposes that plastic, in this context, is a “substance or
material easily shaped or molded,” while defendants suggest it
is “[a]ny moldable material.”
Both parties base these constructions on dictionary
definitions.

Both zero in on the adjectival definition of

“plastic,” which connotes that “plastic” is “capable of being
molded.”

See “plastic,” Merriam-Webster at 890-91.

Both

ignore, however, the definitions of “plastic” in its noun form:
a “synthetic material made from a wide range of organic
polymers, such as polyethylene, PVC, nylon, etc., that can be
moulded into shape while soft, and then set into a rigid or
slightly elastic form.”

Oxford University Press Dictionary,

http://www.oxforddictionaries.com (Jan. 22, 2016).

See also

“plastic,” Merriam-Webster at 890-91 (“any of numerous organic
38

synthetic or processed materials that are mostly thermoplastic
or thermosetting polymers of high molecular weight and that can
be made into objects, films, or filaments.”).
In construing claim terms, the court looks to the intrinsic
evidence before turning to dictionary definitions and may adopt
such definitions only if they comport with the intrinsic
evidence.

See Phillips, 415 F.3d at 1320-23.

Here, the plain

language of the claims, as well as the specifications, suggest
that the patent uses the term “plastic” to indicate from what
substance the element in question is made, not to describe the
particular characteristics of that substance.
Starting with the claim language, claim 27 of the ‘748
patent recites an electrically insulative element “fabricated
from a material selected from the group consisting of plastic or
glass.”

A definition of “plastic” that encompassed “glass”

would render “glass” superfluous in this claim.

This would

violate the canon of claim construction that prefers “[a] claim
construction that gives meaning to all the terms of the claim .
. . over one that does not do so.”

Merck & Co. v. Teva Pharm.

USA, Inc., 395 F.3d 1364, 1372 (Fed. Cir. 2005).

It appears to

the court that both parties’ proposed constructions, which
broadly focus on the moldability of the substance, would
encompass a wide variety of materials not commonly considered
39

“plastic,” including glass.

As SignalQuest’s counsel

acknowledged at oral argument, at a high enough temperature,
glass, and even metal, can be molded.

Injecting the term

“easily” into the construction does not remedy this shortcoming.
The patents’ specifications similarly discuss “plastic”
parts in the context of other materials.

For example, they

suggest that the first and second end caps -- the electrically
conductive elements -- “may be constructed from a composite of
high conductivity and/or low reactivity metals, a conductive
plastic, or any other conductive material.”
at 4:22-26, 6:10-13.

E.g., ‘748 patent

Similarly, the central member -- the

electrically insulative element -- “may be made of plastic,
glass, or any other nonconductive material” or of “a material
having a high melting point that is above that used by commonly
used soldering materials.”

E.g., id. at 5:61-67.

“Plastic,” in

these contexts, connotes the substance that the element is made
of, not the specific properties of how that substance is or was
made.
Here, neither of the parties’ proposed constructions find
support in the intrinsic evidence.

In such a circumstance, as

discussed supra, it is incumbent on the court to independently
determine the claims’ meaning.
1555.

Exxon Chem. Patents, 64 F.3d at

The court concludes that, based on that evidence, it is
40

not the moldability of the substance that informs a person of
skill in the art that the substance referred to in the claims is
a plastic, but rather the composition of that substance.

The

court accordingly adopts the definition of the noun form of the
word “plastic,” as “a synthetic material made from a wide range
of organic polymers, such as polyethylene, PVC, nylon, etc.,
that can be molded into shape while soft, and then set into a
rigid or slightly elastic form.”
Conclusion
For the reasons set forth above, the court adopts the
following constructions of the disputed claim terms:
Term
Diameter
First diameter
and second
diameter
Electrically
conductive
element
Electrically
insulative
element
Distal surface
Distal portion
Distal end
Proximate
surface
Proximate
portion

Construction
the distance through the center of
something from one side to the other
the first diameter is distinct from
the second diameter
an element able to conduct
electricity
an element that prevents or reduces
the transmission of electricity
a surface opposite
proximate surface
a portion opposite
proximate portion
an end opposite in
proximate end
a surface opposite
distal surface
a portion opposite
distal portion
41

in location to a
in location to a
location to a
in location to a
in location to a

Proximate end
Top surface
Outer surface
Bottom surface
Single internal
surface
Flat end surface
Cylindrical lip
Equal in
dimension
Plastic

an end opposite in location to a
distal end
the surface of the outer
circumference
the surface of the inner
circumference
the surface that joins the top
surface and the bottom surface
one surface on a side of the
proximate portion of the electrically
conductive element that is opposite
to the flat end surface
a boundary surface that is smooth,
level, or even
no construction
equal in any geometric dimension
a synthetic material made from a wide
range of organic polymers, such as
polyethylene, PVC, nylon, etc., that
can be molded into shape while soft,
and then set into a rigid or slightly
elastic form

SO ORDERED.
____________________________
Joseph N. Laplante
United States District Judge
Dated:
cc:

June 13, 2016

Brian David Thomas, Esq.
Peter Anthony Nieves, Esq.
Robert R. Lucic, Esq.
Corey M. Weideman, Esq.
Gregory Luck, Esq.
Kristina Caggiano Kelly, Esq.
Samuel W. Apicelli, Esq.
Wesley W. Yuan, Esq.
Bronwyn L. Roberts, Esq.
Marc C. Rouvalis, Esq.
Nicholas F. Casolaro, Esq.
Timothy N. Trop, Esq.
42