       NOTE: This disposition is nonprecedential.


  United States Court of Appeals
      for the Federal Circuit
                ______________________

                     REHCO LLC,
                   Plaintiff-Appellant

                           v.

                SPIN MASTER, LTD.,
                  Defendant-Appellee
                ______________________

                      2017-2589
                ______________________

   Appeal from the United States District Court for the
Northern District of Illinois in No. 1:13-cv-02245, Judge
John Robert Blakey.
                ______________________

               Decided: February 4, 2019
                ______________________

   TIMOTHY EDWARD GROCHOCINSKI, Nelson Bumgardner
Albritton P.C., Orland Park, IL, argued for plaintiff-
appellant. Also represented by JOSEPH P. OLDAKER.

    MEGAN JOANNA REDMOND, Erise IP, P.A., Overland
Park, KS, argued for defendant-appellee. Also represent-
ed by CAROLINE A. BADER, ERIC ALLAN BURESH.
                ______________________
2                                REHCO LLC v. SPIN MASTER, LTD.




           Before PROST, Chief Judge, DYK and MOORE,
                         Circuit Judges.
         Opinion for the court filed by Chief Judge PROST.
    Opinion dissenting-in-part filed by Circuit Judge DYK.
PROST, Chief Judge.
    Plaintiff-appellant Rehco, LLC (“Rehco”) sued defend-
ant-appellee Spin Master, Ltd. (“Spin Master”) for breach
of contract and infringement of U.S. Patent No. 7,100,866
(the “’866 patent”). 1 The district court granted summary
judgment for Spin Master on both claims. Rehco appeals.
We vacate the district court’s summary judgment and
remand for proceedings consistent with this opinion.
                          BACKGROUND
                                 I
    Rehco and Spin Master executed a “Radio-Controlled
Helicopter Agreement” in 2001. J.A. 1316–31 (the “Heli-
copter Agreement”). Under this agreement, Rehco would
develop a toy, and Spin Master would have an exclusive
license to that toy. Spin Master would pay Rehco royal-
ties on sales of the toy. Rehco terminated the Helicopter
Agreement in 2008.
    An auditor conducted an audit of Spin Master’s royal-
ty payments to Rehco, and on October 8, 2010, the parties
executed a “Settlement and Release Agreement” concern-
ing the audit. J.A. 1495–97 (the “Settlement”). The
Settlement defines certain terms as follows:


     1  Rehco’s Second Amended Complaint raised two
breach-of-contract claims—one for each of two contracts.
In accordance with a stipulated dismissal and the district
court’s final judgment, only one of those claims is before
us on appeal.
REHCO LLC v. SPIN MASTER, LTD.                             3



    A. In January of 2009, at the request of Rehco
    [the auditor] conducted an audit of Spin Master’s
    royalty accounting records related to the licenses
    listed below as referenced by the product SKUs
    identified in [the auditor’s] January 2009 report
    (“Audit”) for the selling periods of Q1 2006
    through Q1 2008 (“Audit Period’ [sic]); and
    B. The Parties wish to settle any disputes relating
    to the Audit, and further wish to settle any dis-
    putes relating to the Audit for selling periods out-
    side the Audit Period through Q2 2010
    (“Additional Selling Periods”) on the terms and
    conditions set forth in this Agreement.
J.A. 1495. The Settlement also states:
    Subject to the representations and warranties be-
    low, Rehco hereby releases and forever discharges
    Spin Master . . . from any and all claims, counter-
    claims, demands, damages, debts, liabilities, ac-
    counts, actions and causes of action, known or
    unknown, liquidated or contingent, which are re-
    lated to the Audit and Additional Selling Periods,
    and any claims for royalties thereunder (other
    than the Spin Master obligations under this
    Agreement) which arose, existed, or could have
    been asserted prior to the Effective Date.
J.A. 1496.
                             II
    The ’866 patent is directed to a control system for a
flying vehicle. Rehco defines claims 1, 2, and 3 of the ’866
4                              REHCO LLC v. SPIN MASTER, LTD.




patent as the “Asserted Claims.” 2       Appellant’s Br. 11.
Claim 1 is reproduced below:
    1. A vehicle having a means for propelling in a
    vertical direction, further comprising:
    a transmitter positioned on the bottom of said ve-
       hicle for transmitting a signal from the vehicle
       downwardly away from said vehicle;
    a receiver positioned on the bottom of said vehicle
       for receiving said signal as it is bounced off of a
       surface, defined as a bounced signal; and
    a control system that automatically sets a speed
      of the propelling means in response to the re-
      ceiver, said control system having a first means
      to set the speed of the propelling means to a
      first speed when the receiver receives the
      bounced signal and the control system having a
      second means to set the speed of the propelling
      means to a second speed when the receiver
      does not receive the bounced signal, the first
      speed being predefined as a speed that causes
      the vehicle to gain altitude and the second
      speed being predefined as a speed that causes
      the vehicle to lose altitude.
’866 patent claim 1 (emphasis added).
                             III
   The district court granted summary judgment for
Spin Master on Rehco’s claims for breach of the Helicopter
Agreement and infringement of the ’866 patent.



    2   Rehco agreed that these claims rise and fall to-
gether for purposes of this appeal. Oral Arg. at 10:49–55,
No.      2017-2589,      http://www.cafc.uscourts.gov/oral-
argument-recordings (“Oral Arg.”).
REHCO LLC v. SPIN MASTER, LTD.                         5



    Rehco claimed that Spin Master breached the Heli-
copter Agreement by failing to pay the required royalties.
Relevant here, the parties disputed whether the Settle-
ment precluded Rehco’s claim for royalties on the Havoc
Heli product. The district court found that because the
Havoc Heli was on the market before the audit was initi-
ated, claims on the Havoc Heli “could have been[] assert-
ed” before the Settlement’s Effective Date. J.A. 50. The
court therefore concluded that the Settlement precluded
any claim for royalties on the Havoc Heli. Id.
    As to Rehco’s patent-infringement claim, the district
court found it necessary to construe “a signal” to resolve
the parties’ dispute. The court acknowledged the general
rule that use of the indefinite article “a” means “one or
more” and that exceptions to this rule are “extremely
limited.” J.A. 57–58. But it concluded that the ’866
patent presented such an exception and construed “a
signal” to mean “a single signal being emitted from the
transmitter, and not multiple signals.” J.A. 61. With this
construction, the court concluded that Spin Master’s
products cannot infringe the ’866 patent because all of
those products employ multiple signals. Id.
    The district court also considered another potential
basis for granting summary judgment of non-
infringement—one based on the “predefined speed” limi-
tation of claim 1. The court noted Spin Master’s argu-
ment that the accused products “never set a predefined
speed that causes the vehicle to either gain or lose alti-
tude.” J.A. 62. Although the district court’s opinion is
unclear on whether it adopted this argument as an alter-
native basis for granting summary judgment of non-
infringement 3—independent of its construction of “a


    3  Confusion on this point was evident at oral argu-
ment. Rehco’s counsel at times seemed to concede that
the district court found that summary judgment was
6                             REHCO LLC v. SPIN MASTER, LTD.




signal”—Spin Master advances the same argument on
appeal, which we address below. 4
   Rehco appeals the district court’s summary judgment.
We have jurisdiction under 28 U.S.C. § 1295(a)(1).
                       DISCUSSION
    We review a grant of summary judgment under the
regional circuit’s law. BSG Tech LLC v. Buyseasons, Inc.,
899 F.3d 1281, 1285 (Fed. Cir. 2018). The Seventh Circuit
reviews summary judgments de novo, asking “whether, if
the record of the summary judgment proceeding were the
record of a trial, a reasonable factfinder, whether judge or
jury, could find in favor of the party opposing the motion.”
Reales v. Consol. Rail Corp., 84 F.3d 993, 997 (7th Cir.
1996) (quoting Johnson v. Gudmundsson, 35 F.3d 1104,
1112 (7th Cir. 1994)).



appropriate because the accused products did not satisfy
the “control system/predefined speed” limitation. Oral
Arg. at 4:40–50; id. at 6:15–30. But cf. id. at 5:38–6:01;
id. at 6:31–59. Spin Master’s counsel, however, conceded
that the opinion does not contain a clear statement to that
effect. Oral Arg. at 20:30–21:23.
    4    The district court also noted Spin Master’s argu-
ment that claim 1 is limited to a “binary control system,”
under which the vehicle is always moving up or down
(unlike Spin Master’s characterization of its own products
as maintaining the vehicles at a specific height). J.A. 62.
In response to a clarifying question from this court, Spin
Master’s counsel agreed that the issue regarding the
control-system limitation is whether the accused products
satisfy the predefined-speed limitation of claim 1. Oral
Arg. at 21:50–22:15; id. at 23:01–23:20 (agreeing that the
accused products go up and down based on the receipt or
non-receipt of signals, but not based on setting a prede-
fined speed that causes the vehicles to go up or down).
REHCO LLC v. SPIN MASTER, LTD.                           7



     We review the district court’s contract interpretation
here de novo. See Platinum Tech., Inc. v. Fed. Ins. Co.,
282 F.3d 927, 931 (7th Cir. 2002) (noting that the district
court’s interpretation of an unambiguous contract is
reviewed de novo). We also review claim construction de
novo where, as here, the district court considered only
evidence intrinsic to the patent. E.g., Poly-Am., L.P. v.
API Indus, Inc., 839 F.3d 1131, 1135–36 (Fed. Cir. 2016)
(citing Teva Pharm. USA, Inc. v. Sandoz, Inc., 135 S. Ct.
831, 840–42 (2015)).
     Determining infringement requires two steps:
(1) properly construing the claim; and (2) comparing the
properly construed claim to the accused product. Absolute
Software, Inc. v. Stealth Signal, Inc., 659 F.3d 1121, 1129
(Fed. Cir. 2011). Infringement is a question of fact. Id. at
1129–30. “On appeal from a grant of summary judgment
of non-infringement, we determine whether, after resolv-
ing reasonable factual inferences in favor of the patentee,
the district court correctly concluded that no reasonable
jury could find infringement.” Id. at 1130.
    We discuss Rehco’s breach-of-contract and patent-
infringement claims in turn.
                             I
    Rehco argues that the district court misinterpreted
the Settlement’s release language in concluding that the
release precluded Rehco’s claim for royalties on the Havoc
Heli. Rehco’s argument relies on the Settlement’s defini-
tion of Audit and the release language itself. The Settle-
ment defines “Audit” as follows:
    A. In January of 2009, at the request of Rehco
    [the auditor] conducted an audit of Spin Master’s
    royalty accounting records related to the licenses
    listed below as referenced by the product SKUs
    identified in [the auditor’s] January 2009 report
    (“Audit”) . . . .
8                             REHCO LLC v. SPIN MASTER, LTD.




J.A. 1495 (emphasis added). And the pertinent release
language states:
    Subject to the representations and warranties be-
    low, Rehco hereby releases and forever discharges
    Spin Master . . . from any and all claims, counter-
    claims, demands, damages, debts, liabilities, ac-
    counts, actions and causes of action, known or
    unknown, liquidated or contingent, which are re-
    lated to the Audit and Additional Selling Periods,
    and any claims for royalties thereunder (other
    than the Spin Master obligations under this
    Agreement) which arose, existed, or could have
    been asserted prior to the Effective Date.
J.A. 1496 (emphasis added).
     Rehco’s argument is straightforward. According to
Rehco, the above-quoted release language did not release
Rehco’s claims for royalties on the Havoc Heli because
(1) the release language only released claims “related to
the Audit and Additional Selling Periods, and any claims
for royalties thereunder”; (2) “Audit” is a defined term
limited to the product SKUs identified in the auditor’s
January 2009 report; and (3) there is no dispute that the
Havoc Heli was not included in the January 2009 report.
In other words, Rehco argues that while it released Spin
Master from claims “related to the Audit,” the Havoc
Heli’s absence from the auditor’s January 2009 report
rendered that product not within the scope of how the
parties defined “Audit.” 5 Therefore, Rehco contends, it
did not release any claim for royalties on the Havoc Heli
in the Settlement. We agree with Rehco’s interpretation.




    5    The definition of “Additional Selling Periods” re-
fers to the definition of “Audit Period,” which is defined in
the same passage as “Audit.” J.A. 1495.
REHCO LLC v. SPIN MASTER, LTD.                             9



    Spin Master argues that Rehco “elected to remove its
claims for royalties on the Havoc Heli, and then granted
Spin Master a broad release of its claims ‘related to’ the
audit.” Appellee’s Br. 8. But Rehco did not release its
claims related to the audit; it released its claims related
to the “Audit”—a defined term in the Settlement. Claims
“related to” the “Audit,” as defined, must necessarily
relate to the product SKUs identified in the auditor’s
January 2009 report.
    Spin Master also argues, in line with the district
court’s conclusion, that Rehco knew about the Havoc Heli
before the Settlement’s Effective Date and therefore could
have asserted royalty claims before then. Appellee’s Br.
12–13 (referencing the Settlement’s release language).
But again, Spin Master’s problem is the definition of
“Audit.” Rehco released Spin Master from claims “related
to the Audit and Additional Selling Periods” and “any
claims for royalties thereunder . . . which arose, existed, or
could have been asserted prior to the Effective Date.”
J.A. 1496 (emphasis added). The “thereunder” in this last
clause references the “Audit and Additional Selling Peri-
ods,” and it is undisputed that the Havoc Heli was not
included in the “Audit” as the parties chose to define that
term.
    Rehco has appealed the district court’s summary
judgment on its claim for breach of the Helicopter Agree-
ment only as to the Havoc Heli product. Because we
conclude that the Settlement did not release Rehco’s
claims for royalties on the Havoc Heli, we vacate the
district court’s summary judgment, which was based on a
contrary interpretation of the Settlement.
10                             REHCO LLC v. SPIN MASTER, LTD.




                              II
                              A
    The district court construed “a signal” to mean “a sin-
gle signal being emitted from the transmitter, and not
multiple signals.” J.A. 61. This was error.
     We have held that “[a]s a general rule, the words ‘a’ or
‘an’ in a patent claim carry the meaning of ‘one or more.’”
E.g., 01 Communique Lab., Inc. v. LogMeIn, Inc., 687 F.3d
1292, 1297 (Fed. Cir. 2012) (quoting TiVo, Inc. v. EchoS-
tar Commc’ns Corp., 516 F.3d 1290, 1303 (Fed. Cir.
2008)). “The exceptions to this rule are extremely limited:
a patentee must evince a clear intent to limit ‘a’ or ‘an’ to
‘one.’” Id. (quoting Baldwin Graphic Sys., Inc. v. Siebert,
Inc., 512 F.3d 1338, 1342 (Fed. Cir. 2008)). “That ‘a’ or
‘an’ can mean ‘one or more’ is best described as a rule,
rather than merely as a presumption or even a conven-
tion.” Baldwin Graphic, 512 F.3d at 1342. Importantly
here, “[t]he subsequent use of definite articles ‘the’ or
‘said’ in a claim to refer back to the same claim term does
not change the general plural rule, but simply reinvokes
that non-singular meaning.” O1 Communique, 687 F.3d
at 1297 (quoting Baldwin Graphic, 512 F.3d at 1342).
     Spin Master suggests that a later reference to “a
signal” in claim 1—namely, “a receiver positioned on the
bottom of said vehicle for receiving said signal as it is
bounced off of a surface”—shows a clear intent to limit “a”
to “one.” See Appellee’s Br. 33 (emphasis altered) (quot-
ing ’866 patent claim 1). Spin Master further suggests
that if the claim had said “they” instead of “it,” this would
have allowed for a plural interpretation. Id. But if the
definite article “a” can—indeed, usually does—refer to
“one or more,” so would the pronoun “it” when referring
back to the term that was used with the definite article.
See O1 Communique, 687 F.3d at 1297 (observing that
“[t]he subsequent use of definite articles ‘the’ or ‘said’ in a
claim to refer back to the same claim term does not
REHCO LLC v. SPIN MASTER, LTD.                             11



change the general plural rule, but simply reinvokes that
non-singular meaning”); id. (“The patent’s use of words
such as ‘a,’ ‘its,’ and ‘the’ in the claims is insufficient to
limit the meaning of ‘locator server computer’ to a single
physical computer.”). Using the pronoun “it,” which is
entirely consistent with using the term “a signal,” hardly
demonstrates a clear intent to depart from the general
rule.
     In construing “a signal” to mean a single signal, the
district court likewise relied on later references to “a
signal” in claim 1. For example, the court noted that
“[t]he claim language specifies that the bounced signal . . .
is the same signal that is transmitted downwardly away
from the vehicle.” J.A. 59. Claim 1 does recite “receiving
said signal as it is bounced off of a surface, defined as a
bounced signal” and later refers to receiving or not receiv-
ing “the bounced signal.” ’866 patent claim 1. But this
observation is irrelevant to whether “a signal” should be
limited to a single signal, given that using definite arti-
cles “the” or “said” to refer back to the same claim term
simply reinvokes the term’s non-singular meaning. O1
Communique, 687 F.3d at 1297.
    We have considered Spin Master’s other claim-
construction arguments and find them unpersuasive.
Consistent with the general rule governing the words “a”
or “an,” we construe “a signal” to mean “one or more
signals.”
                              B
    The district court based its summary judgment large-
ly, if not entirely, on its construction of “a signal” as
meaning “a single signal being emitted from the transmit-
ter, and not multiple signals.” Our modification of the
court’s construction necessitates vacating the district
court’s summary judgment of non-infringement.
12                            REHCO LLC v. SPIN MASTER, LTD.




     In doing so, however, we note that the briefing and
oral argument in this case has revealed a disagreement
between the parties as to what would be required to
satisfy claim 1’s predefined-speed limitation, which reads:
“the first speed being predefined as a speed that causes
the vehicle to gain altitude and the second speed being
predefined as a speed that causes the vehicle to lose
altitude.” ’866 patent claim 1. For example, Spin Master
cites record evidence indicating that in response to the
receipt or non-receipt of signals, its accused products
adjust power delivered to the motor by a predefined
percentage—and that the adjustment is proportional to
the current battery power, which itself is subject to
change as the battery drains. Appellee’s Br. 6–7. Thus,
Spin Master concludes that “the accused products do not
set predefined speeds that cause the vehicle to gain or
lose altitude.” Appellee’s Br. 7. Rehco, for its part, argues
that claim 1 “does not require that the first and second
speeds be specific numerical speed values. Rather, they
simply have to be speeds that will cause the vehicle to
gain (first speed), or lose (second speed), altitude.” Appel-
lant’s Br. 49 (citations omitted). Replying to Spin Mas-
ter’s battery-drain argument, Rehco argues that “at least
sometimes (e.g., when the batteries are fully charged), the
accused products are set to a speed that will cause them
to gain altitude (first predefined speed), or a speed that
will cause them to lose altitude (second predefined
speed).” Appellant’s Reply Br. 23.
     On remand, the district court should consider in the
first instance whether the parties’ disagreement reflects
an actual dispute over claim construction and, if so, how
to resolve that dispute.
                       CONCLUSION
    For the foregoing reasons, we vacate the district
court’s summary judgment and remand for proceedings
consistent with this opinion.
REHCO LLC v. SPIN MASTER, LTD.      13



             VACATED AND REMANDED
                          COSTS
    Costs to Rehco.
       NOTE: This disposition is nonprecedential.


  United States Court of Appeals
      for the Federal Circuit
                 ______________________

                     REHCO LLC,
                   Plaintiff-Appellant

                            v.

                 SPIN MASTER, LTD.,
                   Defendant-Appellee
                 ______________________

                       2017-2589
                 ______________________

   Appeal from the United States District Court for the
Northern District of Illinois in No. 1:13-cv-02245, Judge
John Robert Blakey.
                ______________________

DYK, Circuit Judge, dissenting-in-part.
    Although I agree with the majority as to Rehco’s pa-
tent infringement claim, I respectfully dissent from the
majority’s resolution of Recho’s breach of contract claim.
    The question is whether Rehco’s breach claim is
barred by a 2010 Settlement Agreement (“Settlement
Agreement”) between the parties. The background of that
agreement is as follows. In 2001, Rehco and Spin Master
executed the Helicopter Agreement, pursuant to which
Rehco agreed to develop toy helicopters and license both
the toys and “the subject matter of all patents and patent
2                              REHCO LLC v. SPIN MASTER, LTD.




applications filed or to be filed on the” toys to Spin Mas-
ter. J.A. 1319. Spin Master agreed to pay Rehco a royalty
fee based on the number of toys sold. The parties now
disagree as to the amount of royalties due under the
Helicopter Agreement. Rehco’s breach claim in this action
is for unpaid royalties under the Helicopter Agreement.
   Spin Master’s defense is that Rehco’s claim is barred
by the Settlement Agreement. The Settlement Agree-
ment provides:
    Rehco hereby releases and forever discharges Spin
    Master . . . from any and all claims, counter-
    claims, demands, damages, debts, liabilities, ac-
    counts, actions and causes of action, known or
    unknown, liquidated or contingent, which are re-
    lated to the Audit . . . and any claims for royalties
    thereunder . . . which arose, existed, or could have
    been asserted prior to the Effective Date.
J.A. 1496 (emphasis added). The definition of “Audit”
appears earlier in the Settlement Agreement:
    A. In January of 2009, at the request of Rehco
    [the auditor] conducted an audit of Spin Master’s
    royalty accounting records related to the licenses
    listed below as referenced by the product SKUs
    identified in [the auditor’s] January 2009 report
    (“Audit”) for the selling periods of Q1 2006
    through Q1 2008 (“Audit Period’ [sic]); and
    B. The Parties wish to settle any disputes relat-
    ing to the Audit . . . on the terms and conditions
    set forth in this Agreement.
J.A. 1495 (emphasis added).
    The majority concludes that “[c]laims ‘related to’ the
‘Audit,’ as defined, must necessarily relate to the prod-
uct[s] . . . identified in the auditor’s January 2009 report,”
and since the Havoc Heli is not one of the products identi-
REHCO LLC v. SPIN MASTER, LTD.                                3



fied in the January 2009 report, “the Settlement did not
release Rehco’s claims for royalties on the Havoc Heli.”
Majority Op. at 9. I think the majority’s construction of
the agreement is incorrect.
    First, the term “Audit” is not limited to items appear-
ing in the January 2009 report. If the parties had intend-
ed the term “Audit” to be limited to the audit report, they
would have used the term “Audit Report” instead of
“Audit.” On its face, the term “Audit” refers to the de-
scribed “audit of Spin Master’s royalty accounting rec-
ords.” J.A. 1495. And so the term “Audit” covers claims
for unpaid royalties on the Havoc Heli because those
claims were part of the audit process.
    The Helicopter Agreement gave Rehco the right to
hire an independent auditor “to examine and copy [Spin
Master’s] books and records respecting [sic] the manufac-
ture and sales of the Licensed Products.” J.A. 1321. In
2008, Rehco exercised its right under the Helicopter
Agreement to hire an independent auditor “to conduct an
audit of royalties paid and owed by Spin Master” under
the Helicopter Agreement, among other licenses. J.A. 48.
A draft audit report dated July 11, 2008, included claims
for unpaid royalties on the Havoc Heli. Some time there-
after during the course of the audit, Rehco told the audi-
tor to remove the claims for royalties on the Havoc Heli
from the draft report. Consequently, claims for royalties
on sales of the Havoc Heli were not listed in the auditor’s
final January 2009 report. I think that the term “Audit”
on its face encompasses any claim that was part of the
audit, even if it was later removed from the final report.
     Second, even if Rehco had effectively removed its
claims for Havoc Heli royalties from the audit, the Havoc
Heli claims are still “related to the Audit.” The “related
to” language of the Settlement Agreement “itself is a term
of substantial breadth.” Todd Constr., L.P. v. United
4                             REHCO LLC v. SPIN MASTER, LTD.




States, 656 F.3d 1306, 1312–13 (Fed. Cir. 2011). “The
Supreme Court has interpreted the term ‘related to’
broadly.” Id. at 1312 (collecting cases). Our court and
other courts have similarly interpreted contractual provi-
sions containing the terms “related to” or “relating to”
broadly. See, e.g., Tyco Healthcare Grp. L.P. v. Ethicon
Endo-Surgery, Inc., 587 F.3d 1375, 1378–79 (Fed. Cir.
2009); see also Kiefer Specialty Flooring, Inc. v. Tarkett,
Inc., 174 F.3d 907, 909–10 (7th Cir. 1999); Taracorp, Inc.
v. NL Indus., Inc., 73 F.3d 738, 745–46 (7th Cir. 1996);
Harley-Davidson, Inc. v. Minstar, Inc., 41 F.3d 341, 344
(7th Cir. 1994).
    For example, in Tyco Healthcare, we declined to read
the contractual language “[a]ny and all patents and
patent applications relating to any pending litigation” as
limited to “patents asserted in a pending litigation or
patent applications in the same family as an asserted
patent.” 587 F.3d at 1377–78 (emphasis added). Rather,
we read the contractual phrase to cover patents or patent
applications that “could have been reasonably asserted in
or affected by litigation pending at the time.” Id. at 1379.
    The Settlement Agreement is at least ambiguous as to
whether it covers the Havoc Heli claims. At a minimum, I
would vacate the district court’s decision in this respect
and remand to allow the parties to present extrinsic
evidence as to the parties’ understanding of the scope of
the Settlement Agreement.
