Court Opinion

ID: 9839476
Source: CourtListenerOpinion
Date Created: 2023-09-13 15:01:35.26161+00
Date Added: 2024-06-11T09:40:55.824481
License: Public Domain

Case: 20-2118   Document: 128     Page: 1    Filed: 08/30/2023

         NOTE: This disposition is nonprecedential.

    United States Court of Appeals
        for the Federal Circuit
                  ______________________

                 BRIGHT DATA LTD.,
                 Plaintiff-Cross-Appellant

                             v.

                BI SCIENCE (2009) LTD.,
                   Defendant-Appellant

                    BI SCIENCE INC.,
                        Defendant
                  ______________________

        2020-2118, 2020-2181, 2021-1664, 2021-1667
                 ______________________

    Appeals from the United States District Court for the
 Eastern District of Texas in No. 2:18-cv-00483-JRG, Chief
 Judge J. Rodney Gilstrap.
                  ______________________

                 Decided: August 30, 2023
                  ______________________

    ROBERT M. HARKINS, JR., Cherian LLP, Berkeley, CA,
 argued for plaintiff-cross-appellant. Also represented by
 KORULA T. CHERIAN; RONALD WIELKOPOLSKI, Washington,
 DC; COLBY DAVIS, Allen & Overy LLP, Washington, DC.

    MICHAEL A. CHARISH, Charish Law Group PC, New
 York, NY, argued for defendant-appellant. Also argued by
Case: 20-2118    Document: 128      Page: 2    Filed: 08/30/2023

 2                  BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.

 WILLIAM MILLIKEN, Sterne Kessler Goldstein & Fox, PLLC,
 Washington, DC. Also represented by JOHN CHRISTOPHER
 ROZENDAAL,.
                ______________________

     Before PROST, SCHALL, and HUGHES, Circuit Judges.
 PROST, Circuit Judge.
      Bright Data Ltd. (“Bright Data”)1 sued BI Science
 (2009) Ltd. and BI Science Inc. (individually or collectively,
 “BI Science”) 2 for patent infringement in the Eastern Dis-
 trict of Texas. The district court entered final judgment
 that: (1) incorporated all terms of the parties’ mediated set-
 tlement agreement; (2) incorporated all terms of the arbi-
 tration award (the product of an arbitration that followed
 the district court’s enforcement of the settlement); and
 (3) held claim 108 of U.S. Patent No. 9,241,044 (“the ’044
 patent”) invalid as indefinite. J.A. 3. BI Science appeals,
 arguing that the district court erred by finding an enforce-
 able agreement. Bright Data cross-appeals the district
 court’s determination that claim 108 of the ’044 patent is
 invalid as indefinite. We affirm.
                         BACKGROUND
     Bright Data brought claims of patent infringement—
 asserting the ’044 patent and U.S. Patent No. 9,742,866
 (“the ’866 patent”)—and false advertising against BI

     1   Bright Data was formerly known as Luminati Net-
 works Ltd. Order (June 9, 2021), ECF No. 40.
     2   The district court indicated that it is unclear
 whether BI Science (2009) Ltd. and BI Science Inc. are
 merely two names for the same entity or whether the two
 entities are separate. J.A. 2 n.1.
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 BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.                  3

 Science. 3 J.A. 656–83; see also Am. Compl., Luminati Net-
 works Ltd. v. BI Sci. Inc., No. 2:18-cv-00483 (E.D. Tex. Feb.
 19, 2019), ECF No. 28. BI Science, a company headquar-
 tered and with its principal place of business in Israel,
 moved to dismiss for lack of personal jurisdiction.
 J.A. 727–32. The district court denied that motion, deter-
 mining that it had specific personal jurisdiction over BI
 Science based on its purposeful contacts with Texas and
 the direct relationship between those contacts and its al-
 leged infringement and false advertising. J.A. 858–68.
     After its motion to dismiss was denied, BI Science an-
 swered and counterclaimed for declaratory judgment of in-
 validity. Answer to Am. Compl. and Countercl. ¶¶ 109–
 114, Luminati Networks Ltd., No. 2:18-cv-00483 (E.D. Tex.
 May 28, 2019), ECF No. 85. Subsequently, as part of claim
 construction, claim 108 of the ’044 patent was determined
 to be invalid as indefinite. J.A. 1373–74, 1410. This deter-
 mination was later incorporated into the district court’s fi-
 nal judgment, J.A. 3, and is the subject of Bright Data’s
 cross-appeal.
      Following its claim construction order, the district
 court noted its “opinion that th[e] case could benefit from
 renewed mediation efforts” and ordered the parties to con-
 duct a mediation session within ten days. J.A. 1449. Nine-
 teen days later, on February 23, 2020, the parties filed a
 joint motion to stay and notice of settlement, which
 (1) stated “[t]he Parties hereby notify the Court that all
 matters in controversy between the Parties have been set-
 tled, in principle,” (2) requested a thirty-day stay “so that
 appropriate dismissal papers may be submitted,” and
 (3) was signed by counsel for Bright Data and BI Science.
 J.A. 1474–75. The district court granted the joint motion

     3   Bright Data also brought claims of tortious inter-
 ference, J.A. 683, but the district court declined to exercise
 supplemental jurisdiction over those claims, J.A. 861–63.
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 4                  BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.

 to stay and cancelled the hearing set for the following day.
 J.A. 1477. The next day, the mediator also filed a report
 indicating that mediation had “resulted in settlement of all
 claims.” J.A. 1478.
      Bright Data moved to enforce the settlement about a
 month after the joint notice of settlement was filed.
 J.A. 1479–95. BI Science opposed with arguments related
 to why its performance should be excused. J.A. 1547–54.
 At a hearing on the motion to enforce, BI Science argued
 for the first time that there was no binding agreement be-
 tween the parties. The district court disagreed, determin-
 ing that “[i]t’s clear that the major points were agreed to
 and a meeting of the minds was reached at the time the
 Court was informed of the settlement.” J.A. 1694. And
 since “that resolution includes at a minimum a binding pro-
 vision that any unresolved issues . . . would be resolved by
 binding arbitration,” the court instructed the parties to ei-
 ther work together to resolve, or submit to arbitration to
 resolve, any outstanding issues related to the settlement
 terms. J.A. 1693–94.
     After arbitration, the district court entered final judg-
 ment that fully incorporated the settlement agreement and
 arbitration award. J.A. 3. The judgment also incorporated
 the court’s indefiniteness determination on claim 108 of the
 ’044 patent. Id. BI Science timely appealed. Bright Data
 timely cross-appealed. We have jurisdiction under 28
 U.S.C. § 1295(a)(1).
                         DISCUSSION
     BI Science raises two issues on appeal. First, it argues
 that the district court erred by denying its motion to dis-
 miss for lack of personal jurisdiction. Second, it argues
 that the district court erred by finding a binding agreement
 between the parties. As for the cross-appeal, Bright Data
 raises a single issue. It argues that the district court’s in-
 definiteness determination as to claim 108 of the ’044 pa-
 tent was erroneous. We address these issues in that order:
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 BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.                 5

 (1) personal jurisdiction; (2) existence of an enforceable
 agreement; and (3) indefiniteness.
                               I
      Because jurisdiction is a threshold matter, we address
 it first. Unlike with subject-matter jurisdiction, a party
 can consent to personal jurisdiction. Ins. Corp. of Ir. v.
 Compagnie des Bauxites de Guinee, 456 U.S. 694, 702–04
 (1982). BI Science dedicated significant briefing to its ar-
 gument that the district court erred by denying BI Sci-
 ence’s motion to dismiss for lack of personal jurisdiction.
 See Appellant’s Br. 21–38; Appellant’s Reply Br. 24–31.
 But BI Science also acknowledged that if we affirm the dis-
 trict court’s determination that a binding settlement agree-
 ment was formed, then the district court had personal
 jurisdiction over BI Science for purposes of enforcing that
 settlement agreement—i.e., it had consented to personal
 jurisdiction at least to that extent. Oral Arg. at 0:40–57. 4
 For the reasons discussed below, we affirm the district
 court’s determination that there was an enforceable agree-
 ment. As a result, we need not reach BI Science’s personal-
 jurisdiction arguments related to the underlying lawsuit. 5
                               II
     We apply the law of the regional circuit, here the Fifth
 Circuit, when reviewing a district court’s enforcement of a
 settlement agreement. Panduit Corp. v. HellermannTyton
 Corp., 451 F.3d 819, 825 (Fed. Cir. 2006). Under Fifth

     4   https://oralarguments.cafc.uscourts.gov/default.as
 px?fl=20-2118_06072023.mp3.
     5   This dispute about personal jurisdiction also does
 not impact the cross-appeal issue because BI Science itself
 brought a counterclaim of invalidity. See Answer to Am.
 Compl. and Countercl. ¶¶ 109–114, Luminati Networks
 Ltd., No. 2:18-cv-00483 (E.D. Tex. May 28, 2019), ECF
 No. 85.
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 6                  BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.

 Circuit law, “[a] district court may summarily enforce a set-
 tlement agreement if no material facts are in dispute, and
 in such circumstances we review the district court’s order
 for abuse of discretion only.” In re Deepwater Horizon, 786
 F.3d 344, 354 (5th Cir. 2015) (footnote omitted); cf. Haggart
 v. United States, 943 F.3d 943, 947 (Fed. Cir. 2019) (“[W]e
 join the majority of our sibling courts in holding that a dis-
 trict court’s decision whether to summarily enforce a set-
 tlement agreement is reviewed for an abuse of discretion.”).
 When the district court’s enforcement of a settlement
 agreement does depend on resolution of factual disputes,
 its factfindings are reviewed for clear error. Sundown En-
 ergy, L.P. v. Haller, 773 F.3d 606, 614 (5th Cir. 2014).
      BI Science argues that any finding by the district court
 that there was a meeting of the minds related to the settle-
 ment agreement was clearly erroneous. Appellant’s Br. 39.
 Considering the record before the district court and the po-
 sitions taken before it, we discern no error.
     When Bright Data moved to enforce the settlement
 against BI Science, it represented that “[a] full and com-
 plete set of terms was reduced to writing and agreed upon
 by both sides and confirmed in writing,” and it attached
 that writing as an exhibit. J.A. 1482. Additionally, Bright
 Data presented a detailed factual narrative about media-
 tion and the parties’ resulting seventeen-term agreement.
 J.A. 1482–85. In opposition, BI Science did not contest
 Bright Data’s position that there was an agreement be-
 tween the parties, nor did it challenge Bright Data’s factual
 narrative. Instead, BI Science’s arguments were premised
 on the existence of an agreement; it asked that perfor-
 mance under the settlement be either excused or delayed.
 J.A. 1549–50. BI Science did contend, in support of its ex-
 cuse or delay arguments, that the operative agreement was
 not the final or formal version of the settlement. J.A. 1550
 n.3; J.A. 1552. Still, regardless of this characterization of
 the agreement’s formality, one would search in vain for any
 hint that BI Science did not consider itself bound or did not
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 BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.                   7

 intend to bind itself to the agreement when it filed this op-
 position.
      When the district court held a hearing on the motion to
 enforce, BI Science argued for the first time that the medi-
 ated settlement “by itself is not a fully binding settlement”
 and that it did not “contain[] all the material elements and
 requirements needed to form a completely binding settle-
 ment agreement.” J.A. 1659–60. However, its attorney
 also affirmed that he had knowingly participated in the fil-
 ing of the joint notice of settlement representing that all
 matters were resolved, J.A. 1658–59—the precise type of
 notice the district court noted BI Science’s counsel had
 “signed off on . . . probably hundreds of times in [his] prac-
 tice before th[at] [c]ourt,” J.A. 1676. Further, while BI Sci-
 ence’s counsel was careful not to call the parties’ agreement
 a settlement, he still acknowledged that something was
 agreed to. J.A. 1661 (“We agreed and came to an agree-
 ment on a framework to settle the case.”); J.A. 1672 (“[W]e
 agreed to a framework proposed by the mediator as a way
 to hopefully get this case resolved.”); J.A. 1676–77 (“[W]e
 had an agreement to settle the case in principle based on
 the mediator’s proposal in that framework, if you will.”);
 J.A. 1692 (“There’s no question that was part of the agree-
 ment.”). The district court also heard testimony from the
 mediator that he understood both parties to have accepted
 his proposal and resolved the dispute. J.A. 1692–93.
      The district court did not err in concluding that the par-
 ties’ correspondence and conduct, both at the time of agree-
 ment and in response to the motion to enforce, objectively
 indicated mutual assent. Thus, we see no basis to disturb
 the district court’s conclusion that when “both sides know-
 ingly caused to be filed a joint notice . . . there was a reso-
 lution and a settlement of this case,” which included “at a
 minimum a binding provision that . . . any unresolved is-
 sues would be resolved by binding arbitration.”
 J.A. 1693–94.
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 8                  BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.

     We also note that the extent to which BI Science raised
 factual disputes related to a meeting of the minds is diffi-
 cult to discern. Indeed, even on appeal, BI Science confus-
 ingly argues both that the facts surrounding the mediated
 settlement are undisputed, Appellant’s Br. 39, while also
 contending that “Bright Data cannot demonstrate that
 there are no disputed issues of material fact . . . because
 there is no objective evidence of a meeting of the minds, or
 mutual assent,” id. at 56. The district court made reason-
 able inferences about mutual assent based on the facts as
 presented in Bright Data’s motion, which BI Science did
 not contest or challenge, and in light of representations BI
 Science’s counsel made to the court. BI Science has not
 shown clear error in those inferences or, to whatever extent
 they were put at issue, pointed to a clearly erroneous ap-
 prehension of the facts that underlie them.
      As for BI Science’s additional argument that the dis-
 trict court erred in finding a binding agreement because
 the mediated settlement was missing material terms, we
 disagree. Appellant’s Br. 51–53. We note that this argu-
 ment too was not presented in BI Science’s opposition to
 the motion to enforce. At the hearing, BI Science argued
 that the mediated settlement was “a multifaceted, compli-
 cated agreement,” and given this complexity it was missing
 key terms. J.A. 1673. The district court did not err in re-
 jecting this contention. See J.A. 1694.
     BI Science primarily argues that the absence of terms
 defining time for performance rendered the agreement
 nonbinding—i.e., timing was essential or material. We are
 not persuaded. “Generally, the materiality of a contract
 term is determined on a contract-by-contract basis, in light
 of the circumstances of the contract.” Amedisys, Inc. v.
 Kingwood Home Health Care, LLC, 437 S.W.3d 507, 514
 (Tex. 2014). BI Science has not explained, either here or at
 the district court, why terms specifying the timing of per-
 forming certain obligations were necessarily essential to
 this particular settlement agreement.            Time for
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 BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.                 9

 performance has been found nonessential in other settle-
 ment agreements. See CherCo Props. v. Law, Snakard &
 Gambill, P.C., 985 S.W.2d 262, 266 (Tex. App. 1999); cf.
 Houston Cnty. v. Leo L. Landauer & Assocs., 424 S.W.2d
 458, 463 (Tex. App. 1968) (“[W]here the contract does not
 fix a time for performance, the law allows reasonable time
 for its performance.”); Jennings v. Jennings, 625 S.W.3d
 854, 865 (Tex. App. 2021) (noting that even where timing
 is included as a term, “a date of performance in a contract
 does not in itself mean that the parties intended timely per-
 formance to be of the essence”). We do not see a reason to
 conclude otherwise based on the circumstances here. 6
      Next, BI Science argues that the district court erred by
 concluding that there was an enforceable settlement agree-
 ment because the agreement does not comply with the re-
 quirements of Texas Rule of Civil Procedure 11 (“Texas
 Rule 11”). We need not address whether the agreement
 here complies with Texas Rule 11 because BI Science for-
 feited this argument by failing to raise it at the district
 court. Indeed, there are several independent reasons to
 find forfeiture here. First, BI Science never mentioned
 Texas Rule 11 at the district court until after a final judg-
 ment was entered. Oral Arg. at 20:36–21:19; see also Ap-
 pellant’s Reply Br. 16 (citing only briefing on a motion to
 stay enforcement of the final judgment in support of its ar-
 gument that this issue was raised at the district court).
 Next, even setting aside BI Science’s failure to raise the
 specific rule, its applicability is contingent on a threshold
 choice-of-law argument that BI Science also failed to pre-
 sent. Finally, evaluating compliance with Texas Rule 11
 would require resolving factual issues that were not

     6  We also reject BI Science’s argument that terms 10
 and 12 of the agreement are facially contradictory. The
 terms simply refer to the separate obligations of each
 party.
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  10                 BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.

  presented based on a record that was not developed with
  those issues in mind.
       At the outset, we are unpersuaded that noncompliance
  with Texas Rule 11 is merely a new argument supplied in
  support of a properly raised issue—namely, contract inva-
  lidity. BI Science’s position would require us to find that
  any assertion that a contract is invalid preserves all argu-
  ments about every possible basis for contract invalidity.
  This asks too much. See Thomas v. Ameritas Life Ins.
  Corp., 34 F.4th 395, 401–02 (5th Cir. 2022) (where the dis-
  trict court had passed on contract enforceability in general,
  the issue of contract invalidity under a particular state
  statute was forfeited where it was raised for the first time
  on appeal); cf. In re KP Eng’g, L.P., 63 F.4th 452, 457 (5th
  Cir. 2023) (theory of unjust enrichment based on fraud, du-
  ress, or undue advantage presented for the first time on
  appeal was forfeited even where theory of unjust enrich-
  ment based on passive receipt of a benefit was presented at
  the district court); Green Tree Servicing v. House, 890 F.3d
  493, 503 (5th Cir. 2018) (finding new theory in support of
  invalidity of arbitration clause was forfeited because it was
  not raised before the district court even where a different
  theory of invalidity was raised at the district court); Colony
  Ins. Co. v. Wright ex rel. Wrongful Death Beneficiaries of
  Wright, 16 F.4th 1186, 1189 n.1 (5th Cir. 2021) (finding for-
  feiture where party pointed to a new clause in insurance
  policy on appeal to support its previously raised position
  that there was coverage); id. at 1191 (Costa, J., concurring)
  (explaining why even though contract interpretation is a
  legal question subject to de novo review, it is not a “pure
  question of law” such that it should be excepted from the
  rules of forfeiture); cf. also Digital-Vending Servs. Int’l,
  LLC v. Univ. of Phoenix, Inc., 672 F.3d 1270, 1273 (Fed.
  Cir. 2012) (“This court reviews claim constructions without
  deference. However, a party may not introduce new claim
  construction arguments on appeal or alter the scope of the
  claim construction positions it took below.” (cleaned up)).
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  BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.                  11

  Simply put, BI Science’s Texas Rule 11 arguments do not
  amount to “supplementing an [existing invalidity] argu-
  ment with new authority.” Thomas, 34 F.4th at 402. In-
  stead, compliance with Texas Rule 11 is a new issue, which
  was not presented—via BI Science’s cursory arguments
  about contract invalidity at the hearing—or passed upon at
  the district court.
      Regardless, BI Science’s failure to raise an issue about
  the applicability of Texas state law at the district court is
  another reason to find forfeiture here. The Fifth Circuit
  has concluded that “[f]ailure to raise an argument before
  the district court waives that argument, including an argu-
  ment for choice-of-law analysis.” Fruge v. Amerisure Mut.
  Ins. Co., 663 F.3d 743, 747 (5th Cir. 2011); see also Am. Int’l
  Trading Corp. v. Petroleos Mexicanos, 835 F.2d 536, 540
  (5th Cir. 1987). 7 Even though Bright Data’s motion to en-
  force the settlement argued that federal law governed
  questions of contract validity because of the underlying fed-
  eral claims, J.A. 1489, BI Science did not ask the district
  court to engage in a choice-of-law analysis, assert that
  Texas law applied, or identify any particularities to Texas
  contract law (even aside from Texas Rule 11) that might
  impact the district court’s determination that there was an
  enforceable agreement between the parties. The applica-
  tion of Texas Rule 11 was predicated on BI Science first
  prevailing on this unadvanced choice-of-law argument at
  the district court. 8

      7   “Though previous cases may have used the term
  ‘waiver’ instead of ‘forfeiture,’ their holdings are good law
  for a case, like this one, involving the issue of forfeiture.”
  In re Google Tech. Holdings LLC, 980 F.3d 858, 863 n.8
  (Fed. Cir. 2020).
      8   Because the only substantive contract law differ-
  ence identified between federal common law and Texas
  state law relates to BI Science’s forfeited argument about
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  12                 BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.

      Finally, even if the applicability of Texas law and non-
  compliance with Texas Rule 11 were both proper new ar-
  guments in support of an issue already presented, BI
  Science still failed to preserve the factual disputes required
  to resolve the question of compliance with Texas Rule 11.
  Texas Rule 11 requires, among other things, that a settle-
  ment “be in writing, signed and filed with the papers as
  part of the record.” Tex. R. Civ. P. 11. However, the district
  court was never asked to pass upon the question of whether
  the series of emails between the parties and the mediator
  culminating in the agreement to file a joint notice of settle-
  ment were, taken together, sufficient to satisfy the writing
  requirement—or which emails should be considered part of
  the whole. Likewise, the district court was never asked to
  determine which emails from BI Science’s attorney could
  be considered “signed” by considering “the context and sur-
  rounding circumstances.” Cunningham v. Zurich Am. Ins.
  Co., 352 S.W.3d 519, 529 (Tex. App. 2011). Indeed, at oral
  argument, BI Science could not point to anywhere in the
  record where its counsel raised the issue of signatures at
  all. Oral Arg. at 23:46–24:40. “Once we start dissecting
  the record, we find ourselves exactly where the forfeiture
  rule says we should not be—deciding issues based on inad-
  equately developed facts.” Colony Ins. Co., 16 F.4th at 1191
  (Costa, J., concurring).
      In sum, we affirm the district court’s determination
  that there was a binding settlement agreement between
  the parties. Since BI Science does not challenge any of the
  arbitrator’s determinations about disputed contract terms,
  we affirm the district court’s judgment to the extent it

  Texas Rule 11, we decline to resolve the parties’ dispute
  about which law applies. Citations to Texas contract cases
  in this opinion are illustrative of general contract princi-
  ples and do not indicate an implicit resolution of this dis-
  pute.
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  BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.                     13

  incorporated the settlement agreement and incorporated
  the arbitration award.
                                III
      On cross-appeal we also affirm the district court’s de-
  termination that claim 108 of the ’044 patent is indefinite.
  The ’044 patent generally relates to “an apparatus and
  method for improving communication over the Internet by
  using intermediate nodes, and in particular, to using de-
  vices that may doubly function as an end-user and as an
  intermediate node.” ’044 patent col. 1 ll. 13–17.
      Claim 108 is reproduced below:
      108.     A method for fetching over the Internet a
      first content, identified by a first content identifier,
      by a first device, identified in the Internet by a first
      identifier, from a second server identified in the In-
      ternet by a third identifier via a second device iden-
      tified in the Internet by a second identifier, using a
      first server, the method comprising the steps of:
          (a) sending the second identifier to the first
          server;
          (b) receiving a second request from the first
          device, the second request includes the first
          content identifier and the third identifier;
          (c) in response to receiving the second re-
          quest, sending the first content identifier to
          the second server using the third identifier;
          (d) receiving the first content from the sec-
          ond server; and
          (e) in response to receiving the first con-
          tent, sending the first content to the first
          device using the first identifier.
  ’044 patent claim 108 (emphasis added).
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  14                  BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.

      Section 112’s definiteness requirement mandates that
  “a patent’s claims, viewed in light of the specification and
  prosecution history, inform those skilled in the art about
  the scope of the invention with reasonable certainty.” Nau-
  tilus, Inc. v. Biosig Instruments, Inc., 572 U.S. 898, 910
  (2014). “We review a determination of indefiniteness de
  novo.” BASF Corp. v. Johnson Matthey Inc., 875 F.3d 1360,
  1365 (Fed. Cir. 2017). To the extent reliance on extrinsic
  evidence is appropriate, we review any relevant factfind-
  ings for clear error. Id.
       The district court first concluded that the preamble of
  claim 108 is limiting. J.A. 1366. Bright Data does not chal-
  lenge that determination. Next, the district court con-
  cluded that the claim is indefinite because “[t]he recital of
  ‘via a second device’ in Claim 108 fails to find any reasona-
  bly clear meaning in the context of the remainder of the
  claim, in particular as to the steps recited in the body of the
  claim.” J.A. 1373. The court also found Bright Data’s ar-
  guments and expert testimony about whether all the steps
  can be performed by the second device unhelpful in provid-
  ing reasonable certainty about which steps must be per-
  formed by the second device. J.A. 1374. We agree with the
  district court’s analysis.
       Bright Data argues that a person of ordinary skill in
  the art (“POSA”) would understand that all the steps of
  claim 108 are performed by the “second device.” In other
  words, despite the preamble’s requirement that the steps
  are, among other things, “[a] method for fetching over the
  Internet a first content, identified by a first content identi-
  fier, by a first device,” ’044 patent claim 108 (emphasis
  added), a POSA would understand that a first device need
  not perform any of the enumerated steps. In support of this
  argument, Bright Data contends that a POSA would un-
  derstand both that “second device” is synonymous with the
  specification’s discussion of “tunnel device” and that the fo-
  cus of claim 108 is on the steps performed by this sec-
  ond/tunnel device.          Bright Data contrasts this
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  BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.                  15

  understanding with claim 81, bearing an identical pream-
  ble, which it contends involves steps a POSA would under-
  stand to be performed by the client/first device. In
  addition, Bright Data points to expert testimony explain-
  ing that the enumerated steps in claim 108 could be per-
  formed by a second device. Cross-Appellant’s Br. 48 (citing
  J.A. 1047–51). We are not persuaded that the specification
  or this expert testimony resolves the uncertainty created
  by the language of claim 108.
       The specification does not define a tunnel device as a
  second device. In fact, the specification explains that “[a]
  device may be both a client device and a tunnel device, and
  the roles may be assumed one at a time, or may be em-
  ployed in parallel using multitasking or multiprocessing.”
  ’044 patent col. 51 ll. 43–46 (emphasis added). Thus, even
  if we look to the specification’s descriptions of a tunnel de-
  vice, there is still a zone of uncertainty about the roles of a
  “first device” and a “second device” required to practice
  claim 108.
      Similarly, Bright Data’s expert’s testimony that a sec-
  ond device could perform the steps does not resolve this un-
  certainty. If all the steps are performed by the “second
  device,” then the role of “by a first device” in the preamble
  is unknown. Alternatively, if “by a first device” means that
  some of the steps are performed by that device (Bright Data
  insists this is not the case), then it is uncertain which steps
  those are. Thus, even if Bright Data is correct that a POSA
  would understand from the language of the steps alone
  that they can be performed by a second device, there is no
  reasonable certainty about how to harmonize an under-
  standing of the limiting preamble with the body of the
  claim.
      For these reasons, we affirm the district court’s deter-
  mination that claim 108 of the ’044 patent is invalid as in-
  definite.
Case: 20-2118   Document: 128      Page: 16    Filed: 08/30/2023

  16                BRIGHT DATA LTD. v. BI SCIENCE (2009) LTD.

                        CONCLUSION
      We have considered the parties’ remaining arguments
  and find them unpersuasive. We affirm the district court’s
  final judgment.
                        AFFIRMED
                           COSTS
  No Costs.