Westerngeco L.L.C. v. Ion Geophysical Corp. , 913 F.3d 1067 ( 2019 )


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  •   United States Court of Appeals
    for the Federal Circuit
    ______________________
    WESTERNGECO L.L.C.,
    Plaintiff-Cross-Appellant
    v.
    ION GEOPHYSICAL CORPORATION,
    Defendant-Appellant
    ______________________
    2013-1527, 2014-1121, 2014-1526, 2014-1528
    ______________________
    Appeals from the United States District Court for the
    Southern District of Texas in No. 4:09-cv-01827, Judge
    Keith P. Ellison.
    ______________________
    Decided: January 11, 2019
    ______________________
    JOHN C. O'QUINN, Kirkland & Ellis LLP, Washington,
    DC, argued for plaintiff-cross-appellant. Also represented
    by GREGG F. LOCASCIO, WILLIAM H. B URGESS; TIMOTHY
    GILMAN, LESLIE M. SCHMIDT, New York, NY; LEE LANDA
    KAPLAN, Smyser, Kaplan & Veselka, LLP, Houston, TX.
    DAVID I. BERL, Williams & Connolly LLP, Washington,
    DC, argued for defendant-appellant. Also represented by
    KANNON K. SHANMUGAM, MASHA HANSFORD, ANDREW
    CHARLES MCBRIDE, JAMES MATTHEW RICE; FRANK
    PORCELLI, KEVIN SU, Fish & Richardson, PC, Boston, MA;
    JACKOB BEN-EZRA, B AILEY KATHLEEN HARRIS, DANIELLE J.
    2              WESTERNGECO L.L.C. v. ION GEOPHYSICAL CORP.
    HEALEY, BRIAN GREGORY S TRAND, Houston, TX; FRANCIS
    J. ALBERT, OLGA I. MAY, San Diego, CA; JUSTIN BARNES,
    Troutman Sanders LLP, San Diego, CA.
    ______________________
    Before DYK, WALLACH, and HUGHES, Circuit Judges.
    DYK, Circuit Judge.
    This case returns to us from the Supreme Court.
    WesternGeco LLC v. ION Geophysical Corp., 
    138 S. Ct. 2129
    (2018) (“WesternGeco III”). The sole claim remanded
    to us by the Supreme Court is the lost profits award. The
    Supreme Court held “that WesternGeco’s damages award
    for lost profits was a permissible domestic application of
    [35 U.S.C.] § 284,” 
    id. at 2139,
    reversing our decision in
    WesternGeco LLC v. ION Geophysical Corp., 
    791 F.3d 1340
    , 1349–52 (Fed. Cir. 2015), (“WesternGeco I”).1 But
    the Supreme Court did not decide other challenges to the
    lost profits award. In light of the Supreme Court’s deci-
    sion and the intervening invalidation of four of the five
    asserted patent claims that could support the lost profits
    award, we remand to the district court.
    BACKGROUND
    This case involves a patent infringement suit brought
    by WesternGeco L.L.C. (“WesternGeco”) against ION
    Geophysical Corp. (“ION”) for infringement of claims 18,
    19, and 23 of U.S. Patent No. 7,293,520, claim 15 of U.S.
    Patent No. 7,162,967, and claim 15 of U.S. Patent No.
    1   Our decision in WesternGeco I was vacated on
    other grounds by WesternGeco LLC v. ION Geophysical
    Corp., 
    136 S. Ct. 2486
    (2016), but was reinstated in rele-
    vant part on remand by WesternGeco LLC v. ION Geo-
    physical Corp., 
    837 F.3d 1358
    (Fed. Cir. 2016)
    (“WesternGeco II”).
    WESTERNGECO L.L.C. v. ION GEOPHYSICAL CORP.              3
    7,080,607 (“Bittleston patents”), as well as claim 14 of
    U.S. Patent No. 6,691,038 (“Zajac patent”).
    The patented technology in this case relates to marine
    seismic surveys for discovering oil and gas deposits be-
    neath the ocean floor. The patent claims are directed to
    technology for controlling the movement and positioning
    of long streamers towed by a ship. Sensors are located
    along the length of these streamers, and they detect
    returning sound waves that are bounced off of the ocean
    floor by an airgun. The collected data is then used to
    create a map of the ocean’s subsurface geology. Control-
    ling the positioning of the various streamers in the array
    is important to the quality of the maps generated, which,
    in turn, is important to identifying drilling locations for
    oil or gas.
    Both WesternGeco and ION domestically manufac-
    ture devices, the Q-Marine and DigiFin respectively, for
    steering streamers in marine seismic surveys. Western-
    Geco does not sell its device, instead using it to perform
    surveys abroad for oil companies. ION does not perform
    surveys, instead supplying its device to customers who
    perform the surveys abroad. This case does not involve
    any question as to lost profits from domestic surveys.
    In 2009, WesternGeco sued ION for patent infringe-
    ment based on ION’s sales of its DigiFin devices to West-
    ernGeco’s competitors in the marine seismic survey
    market. After a jury trial, the asserted patent claims were
    found to be not invalid, and ION was found to have in-
    fringed all of the asserted patent claims under 35 U.S.C.
    §§ 271(f)(1) and (2). The jury awarded WesternGeco a
    reasonable royalty of $ 12.5 million and lost profits of
    $ 93.4 million, but declined to award WesternGeco en-
    hanced damages for willful infringement. The lost profits
    award was based on 10 surveys, which, according to
    WesternGeco, it would have won “but-for” ION’s sales of
    its DigiFin device to WesternGeco’s competitors. West-
    4              WESTERNGECO L.L.C. v. ION GEOPHYSICAL CORP.
    ernGeco argues that without the patented technology
    embodied in the device, ION’s customers would not have
    been able to win the bids for the 10 surveys at issue.
    In WesternGeco I we reversed the lost profits award as
    being based on an unauthorized extraterritorial applica-
    tion of the patent laws. Judge Wallach dissented on this
    
    point. 791 F.3d at 1349
    –52, 1354–64. We unanimously
    affirmed the district court’s refusal to award enhanced
    damages for willful infringement. WesternGeco 
    I, 791 F.3d at 1353
    –54. WesternGeco petitioned for certiorari, which
    the Supreme Court granted, vacated our original decision
    in WesternGeco I, and remanded for further proceedings
    consistent with its decision in Halo Elecs., Inc. v. Pulse
    Elecs., Inc., 
    136 S. Ct. 1923
    , 1935–36 (2016). We reinstat-
    ed our earlier opinion, including reversal of the lost prof-
    its award, but we vacated the district court’s denial of
    enhanced damages and remanded for further considera-
    tion in light of Halo. WesternGeco 
    II, 837 F.3d at 1361
    –64.
    On remand, WesternGeco sought $ 43.6 million in en-
    hanced damages, and the district court awarded West-
    ernGeco $ 5 million in enhanced damages. The parties
    then entered into a stipulated “Final Judgment pursuant
    to Fed. R. Civ. P. 58.” The stipulation noted that the
    parties had agreed to the reasonable royalty amount and
    that ION had paid the full amount on November 25, 2016.
    Both parties agreed not to appeal the enhanced damages
    award and provided a schedule for payment of the en-
    hanced damages award. The only item exempt from the
    stipulation was the lost profits award, which Western-
    Geco had petitioned for certiorari, requesting review of
    our decision on the lost profits award. Neither party
    appealed the stipulated final judgment.
    The petition was granted with respect to the lost prof-
    its award, and in WesternGeco III, the Supreme Court
    reversed our decision on lost profits, holding that “West-
    ernGeco’s damages award for lost profits [under 35 U.S.C.
    WESTERNGECO L.L.C. v. ION GEOPHYSICAL CORP.               5
    § 271(f)(2)] was a permissible domestic application of
    § 
    284,” 138 S. Ct. at 2139
    , “as it was ION’s domestic act of
    supplying the components that infringed WesternGeco’s
    patents,” 
    id. at 2138.
    The Supreme Court also noted that
    “[i]n reaching this holding, we do not address the extent
    to which other doctrines, such as proximate cause, could
    limit or preclude damages in particular cases.” 
    Id. at 2139
    n.3. The Court then remanded the case to us “for further
    proceedings consistent with this opinion.” 
    Id. at 2139
    .
    In December 2015, the United States Patent and
    Trademark Office’s Patent Trial and Appeal Board
    (“PTAB”) held four of the six asserted patent claims—’520
    patent claims 18 and 19, ’967 patent claim 15, and ’607
    patent claim 15—unpatentable. See WesternGeco LLC v.
    ION Geophysical Corp., 
    889 F.3d 1308
    , 1331 (Fed. Cir.
    2018) (“WesternGeco IPR”). While the case was pending in
    the Supreme Court, we affirmed the PTAB’s unpatenta-
    bility determination of these four claims. 
    Id. Thus, the
    only asserted claims that remain are ’520 patent claim 23
    and ’038 patent claim 14, and it is uncontested that only
    ’520 patent claim 23 may now support the lost profits
    award.
    DISCUSSION
    On remand from the Supreme Court, two issues re-
    main for us to resolve: (1) the impact of the intervening
    invalidation of four of the six asserted patent claims on
    the fully paid reasonable royalty award, and (2) the
    impact of the invalidation of the four claims on the lost
    profits award and ION’s argument (presented in its
    original appeal) that “Panduit cannot be satisfied because
    ION and [WesternGeco] do not compete in the market-
    place.” ION Open. Br. 56.
    I. Reasonable Royalty Award
    ION challenges the fully paid and satisfied reasonable
    royalty award based on subsequent invalidation of a
    6              WESTERNGECO L.L.C. v. ION GEOPHYSICAL CORP.
    number of WesternGeco’s asserted patent claims. See
    WesternGeco 
    IPR, 889 F.3d at 1331
    . ION argues that the
    calculation of the reasonable royalty under Georgia-
    Pacific Corp. v. U.S. Plywood Corp., 
    318 F. Supp. 1116
    ,
    1120 (S.D.N.Y. 1970), would be affected by the invalida-
    tion of four of the six asserted patent claims, and there-
    fore a new trial is required. For support, ION frames the
    decision in Fresenius USA, Inc. v. Baxter International,
    Inc., 
    721 F.3d 1330
    (Fed. Cir. 2013) as holding that a
    judgment cannot be final for purposes of intervening
    patent invalidations if any part of the litigation remains
    pending, and that here the lost profits award continues to
    be litigated and is not final.
    We disagree. Fresenius only applies where a judgment
    is not final. 
    Id. at 1340–41
    & n.9; see also Fresenius USA,
    Inc. v. Baxter Int’l, Inc., 
    733 F.3d 1369
    , 1371 (Fed. Cir.
    2013) (Dyk, J., concurring in denial of rehearing en banc).
    To be sure, finality under Fresenius requires that “the
    litigation must be entirely concluded so that [the] cause of
    action [against the infringer] was merged into a final
    judgment . . . one that ends the litigation on the merits
    and leaves nothing for the court to do but execute the
    
    judgment.” 721 F.3d at 1341
    (alterations in original)
    (quoting Mendenhall v. Barber–Greene Co., 
    26 F.3d 1573
    ,
    1580 (Fed. Cir. 1994); see ePlus, Inc. v. Lawson Software,
    Inc., 
    789 F.3d 1349
    , 1358 (Fed. Cir. 2015). But Fresenius
    made clear that it does not allow reopening of a satisfied
    and unappealable final 
    judgment. 721 F.3d at 1340
    (“As
    the Supreme Court’s decision in Moffitt made clear, ‘[i]t is
    a mistake to suppose . . . that . . . moneys recovered on
    judgments in suits . . . might be recovered back [after a
    patent is cancelled]. The title to these moneys does not
    depend upon the patent, but upon . . . the judgment of the
    court.’” (alterations in original) (quoting Moffitt v. Garr,
    
    66 U.S. 273
    , 283 (1861)); see Pennsylvania v. Wheeling &
    Belmont Bridge Co., 
    59 U.S. 421
    , 431 (1855).
    WESTERNGECO L.L.C. v. ION GEOPHYSICAL CORP.               7
    The particular facts of this case establish that the
    reasonable royalty award constitutes a fully satisfied and
    unappealable final judgment such that the subsequent
    invalidation of asserted patent claims does not support
    reopening. Here, ION and WesternGeco entered into a
    compromise agreement resolving all of the issues in the
    case except for the lost profits award. They stipulated to a
    “Final Judgment pursuant to Fed. R. Civ. P. 58,” and ION
    further manifested assent to the finality of the judgment
    as to the reasonable royalty award by not appealing the
    judgment and completing its payments under the agree-
    ment. The parties’ agreement was reflected in a joint
    motion filed in June 2017 that resolved all of the issues
    except for lost profits, although the IPR decisions holding
    that four of the six asserted patent claims were unpatent-
    able had issued in December 2015. In these unique cir-
    cumstances, it is clear that the reasonable royalty and
    enhanced damages awards were agreed to by the parties
    and subject to an unappealable final judgment, which was
    satisfied and paid in full by ION to WesternGeco. ION
    cannot now reopen the agreed and fully paid unappeala-
    ble final judgment on the reasonable royalty based on the
    subsequent invalidation of a subset of asserted patent
    claims.
    II. Lost Profits
    ION argues that, despite the Supreme Court’s deci-
    sion in WesternGeco III, we should either hold that lost
    profits are not recoverable in this case or remand for a
    new trial.
    First, ION contends that the district court erred when
    it denied ION’s renewed motion for judgment as a matter
    of law (“JMOL”) on the theory that WesternGeco is not
    entitled to lost profits based on a Panduit theory of but-
    for causation because ION and WesternGeco are not
    “direct competitors.” ION sells only devices and Western-
    Geco sells only surveys. According to ION, because West-
    8               WESTERNGECO L.L.C. v. ION GEOPHYSICAL CORP.
    ernGeco and ION do not compete in the same market, lost
    profits in the surveys are not recoverable. For legal sup-
    port, ION relies on a statement from Rite-Hite Corp. v.
    Kelley Co., 
    56 F.3d 1538
    (Fed. Cir. 1995) (en banc) that
    “the patentee must show a reasonable probability that,
    ‘but for’ the infringement, it would have made the sales
    that were made by the infringer.” 
    Id. at 1545
    (emphasis
    added). ION argues that the emphasized language estab-
    lished a “direct competition” requirement between the
    patentee and alleged infringer. ION also relies on our
    decision in BIC Leisure Products, Inc. v. Windsurfing
    International Inc., 
    1 F.3d 1214
    (Fed. Cir. 1993), that “[t]he
    Panduit test . . . operates under an inherent assumption
    . . . that the patent owner and the infringer sell products
    sufficiently similar to compete against each other in the
    same market segment.” 
    Id. at 1217–20.
        We are not convinced. In context, the statement from
    Rite-Hite was addressing the requirement of “but-for”
    causation to recover lost profits, not imposing a require-
    ment of direct competition between the patentee and
    alleged infringer that was neither at issue in the case nor
    further discussed in the opinion. 
    See 56 F.3d at 1545
    . BIC
    clearly focused the inquiry on whether the patent owner’s
    and the infringer’s products are adequate substitutes for
    consumers in a particular 
    market. 1 F.3d at 1219
    . West-
    ernGeco’s and ION’s devices competed by performing the
    same types of functions for surveys. And there was suffi-
    cient evidence in the record for the jury to conclude that
    the products did compete—i.e., that consumers in the
    surveying market (oil companies) considered Western-
    Geco’s Q-Marine device and ION’s DigiFin device to be
    substitutes for their surveying needs (i.e., that the prod-
    ucts competed in the same market). See, e.g., J.A. 3791:1–
    23; 7006; 7135.
    To be sure, the fact that ION sells only devices while
    WesternGeco only sells surveys may be relevant to the
    computation of lost profits. WesternGeco had two catego-
    WESTERNGECO L.L.C. v. ION GEOPHYSICAL CORP.                  9
    ries of lost profits: the profits attributable to providing the
    patented device and the profits attributable to providing
    other aspects of the surveys (e.g., the ship for towing the
    streamers). “[A]pportionment is required even for non-
    royalty forms of damages.” Ericsson, Inc. v. D-Link Sys.,
    Inc., 
    773 F.3d 1201
    , 1226 (Fed. Cir. 2014). If the applica-
    tion of the Panduit factors does not result in the separa-
    tion of profits attributable to the patented device and the
    profits attributable to providing other aspects of the
    surveys (e.g., the ship for towing the streamers), it ap-
    pears that apportionment is necessary. 2
    This apportionment argument was not made in the
    supplemental briefing and was raised for the first time at
    oral argument. We conclude that the argument was
    waived on this appeal. However, if the district court
    orders a new trial on damages, ION may present argu-
    ments concerning apportionment at the new trial.
    ION’s second argument is that the lost profits award
    cannot be sustained due to the intervening invalidation of
    four of the five asserted Bittleston patent claims. Here,
    the jury found all of the asserted claims to be infringed
    and made a single lost profits award. But four of the five
    claims relied on to support lost profits liability have since
    been eliminated, and now the only remaining claim that
    could support the lost profits award is ’520 patent claim
    23, a dependent device claim. The jury instructions and
    verdict form did not instruct the jury to award damages
    based separately on infringement of each of the asserted
    claims, and the jury did not do so.
    2   See Mentor Graphics Corp. v. EVE-USA, Inc., 
    851 F.3d 1275
    , 1287–88 (Fed. Cir. 2017) (holding that “satis-
    faction of the Panduit factors satisifie[d] principles of
    apportionment” where, “on the undisputed facts of this
    record,” it was clear the plaintiff’s damages were “tied to
    the worth of its patented features”).
    10             WESTERNGECO L.L.C. v. ION GEOPHYSICAL CORP.
    The jury could have rested its award on infringement
    of a now-invalidated claim, which cannot be sustained on
    review. The general rule is that when a “jury was told it
    could rely on any of two or more independent legal theo-
    ries, one of which was defective,” the general verdict must
    be set aside. i4i Ltd. P’ship v. Microsoft Corp., 
    598 F.3d 831
    , 849–50 (Fed. Cir. 2010) (citing Walther v. Lone Star
    Gas Co., 
    952 F.2d 119
    , 126 (5th Cir. 1992)), aff’d, 
    564 U.S. 91
    (2011); see Northpoint Tech., Ltd. v. MDS Am., Inc.,
    
    413 F.3d 1301
    , 1311–12 (Fed. Cir. 2005); United N.Y. &
    N.J. Sandy Hook Pilots Ass’n v. Halecki, 
    358 U.S. 613
    ,
    619 (1959) (“[A] new trial will be required, for there is no
    way to know that the invalid [legal theory] was not the
    sole basis for the verdict.”); Maryland v. Baldwin, 
    112 U.S. 490
    , 493 (1884). We have recognized such a rule “[i]n
    a situation—such as this one—where the jury rendered a
    single verdict on damages, without breaking down the
    damages attributable to each patent,” and at least one of
    the patent claims was held to be defective. Verizon Servs.
    Corp. v. Vonage Holdings Corp., 
    503 F.3d 1295
    , 1310
    (Fed. Cir. 2007) (citing Memphis Cmty. Sch. Dist. v.
    Stachura, 
    477 U.S. 299
    , 312 (1986)); see Accentra, Inc. v.
    Staples, Inc., 500 F. App’x 922, 931 (Fed. Cir. 2013).
    But we do not think a new trial is automatically re-
    quired here if the jury must have found the technology
    covered by ’520 patent claim 23 was essential for perform-
    ing the surveys. In other words, the award can be sus-
    tained if there was undisputed evidence that the
    technology covered by ’520 patent claim 23 was necessary
    to perform the surveys. In this area we apply a harmless-
    ness analysis similar to our approach in the case of erro-
    neous jury instructions. See Avid Tech., Inc. v. Harmonic,
    Inc., 
    812 F.3d 1040
    , 1047 (Fed. Cir. 2016) (“[T]he error in
    the instruction governing this central dispute at trial
    would be harmless only if a reasonable jury would have
    been required by the evidence to find non-infringement
    even without the error.”).
    WESTERNGECO L.L.C. v. ION GEOPHYSICAL CORP.               11
    WesternGeco argues that both parties’ damages ex-
    perts informed the jury that infringement of any one of
    the Bittleston patent claims would support the full
    amount of the lost profits award. It cites to ION’s own
    expert, Mr. Gunderson. He testified that he “assumed
    that . . . the patents are not found to be invalid and that—
    that there is infringement that is occurring on at least one
    valid claim,” “one of the base assumptions” for damages
    experts. WesternGeco Open. Suppl. Br. 15 (citing Trial Tr.
    at 4655:12–4656:3, WesternGeco LLC v. ION Geophysical
    Corp., 
    953 F. Supp. 2d 731
    (S.D. Tex. 2013), ECF No.
    507). WesternGeco reads too much into this testimony.
    Mr. Gunderson was merely identifying the basic assump-
    tion of his patent damages calculations, and his testimony
    was directed to showing that WesternGeco was not enti-
    tled to the claimed lost profits for infringement based on
    any of the patents. See, e.g., Trial Tr. at 4658, 4664, 4736,
    ECF No. 507. We do not interpret this testimony as
    supporting the theory that the entirety of the lost profits
    could be supported by infringement of any one Bittleston
    patent claim.
    WesternGeco also relies on its own expert, Mr. Sims.
    He testified that Bittleston’s lateral steering technology
    was required to perform surveys and that “my under-
    standing is that the benefits would be attributable to each
    of the [Bittleston] patents because each of the patents
    would prohibit ION from being able to sell and supply
    and, therefore, the contractors from being able to use the
    lateral steering technology.” WesternGeco Open. Supp.
    Br. 14–15 (citing Trial Tr. at 2661:13–2662:6, ECF No.
    497).
    But it is clear that Sims was simply making an as-
    sumption rather than making an independent determina-
    tion the technology represented in the claims was
    necessary to perform the surveys. See, e.g., Trial Tr. at
    2386:2–7, ECF No. 474. Sims was a damages expert. He
    disclaimed knowledge as to the technical aspects, and
    12             WESTERNGECO L.L.C. v. ION GEOPHYSICAL CORP.
    explicitly relied on others to support his assumption that
    infringement of any one of the Bittleston patent claims
    would have been necessary to perform the 10 surveys at
    issue in the lost profits award. See, e.g., Trial Tr. at
    2378:24–25 (“I confirmed with Mr. Walker, that there was
    a requirement for lateral steering”), 2386, ECF No. 474;
    Trial Tr. at 2657–58, ECF No. 497. Sims testified that he
    relied on Mr. Walker for help in identifying surveys where
    the patented technology was required, but Mr. Walker
    disclaimed any knowledge as to the scope of the patents.
    See Trial Tr. at 1760–61, ECF No. 453. Thus, this testi-
    mony cannot support the jury award on lost profits.
    WesternGeco has also not cited to any other specific
    testimony that infringement of ’520 patent claim 23 was
    necessary to perform the 10 surveys at issue. Instead, at
    oral argument, WesternGeco argued that the jury was
    informed generally that the lateral steering technology
    was required for the surveys at issue and that claim 23
    covers part of that technology. But lateral steering tech-
    nology was also reflected in the four other, now-invalid,
    asserted claims—’520 patent claims 18 and 19, ’967
    patent claim 15, and ’607 patent claim 15. For example,
    now-invalid ’520 patent claim 18 recites:
    An apparatus comprising:
    (a) an array of streamers each having a plu-
    rality of streamer positioning devices there
    along;
    (b) a control system configured to use a control
    mode selected from a feather angle mode, a
    turn control mode, a streamer separation
    mode, and two or more of these modes. ’520
    Claim 18.
    And now-invalid ’520 patent claim 19 recites:
    The apparatus of claim 18 wherein the control
    mode is the feather angle mode, and the control-
    WESTERNGECO L.L.C. v. ION GEOPHYSICAL CORP.                13
    ling comprises the control system attempting to
    keep each streamer in a straight line offset from a
    towing direction by a feather angle.
    The only surviving claim, ’520 patent claim 23, recites:
    The apparatus of claim 18 wherein the towing
    comprises ending one pass, turning a towing ves-
    sel having the streamers attached thereto while
    throwing out the streamers before beginning an-
    other pass, with the control mode in the turn con-
    trol mode during the turning and throwing out.
    To sustain the lost profits award, the record must estab-
    lish that there was no dispute that the technology covered
    by claim 23, independent of the technology covered by the
    now-invalid claims (e.g., ’520 patent claim 18 and 19), was
    required to perform the surveys at issue. This determina-
    tion must be made on the present record.
    Because of inadequate briefing on this issue prior to
    oral argument, 3 and because the district court is in a
    better position to consider the issue in the first instance,
    we remand to the district court to determine whether a
    new trial on lost profit damages is required. See 
    Verizon, 503 F.3d at 1310
    ; DDR Holdings, LLC v. Hotels.com, L.P.,
    
    773 F.3d 1245
    , 1262 (Fed. Cir. 2014). The district court
    may deny a new trial on lost profits if, but only if, it
    concludes that WesternGeco established at trial with
    undisputed evidence that ’520 patent claim 23 covers
    technology necessary to perform the surveys upon which
    the lost profits award is based.
    3    The parties subsequently filed Fed. R. App. P.
    28(j) letters addressing where in the record the jury was
    informed that the technology covered by ’520 patent claim
    23 was necessary to perform the surveys at issue.
    14                WESTERNGECO L.L.C. v. ION GEOPHYSICAL CORP.
    CONCLUSION
    For the foregoing reasons, we reject ION’s challenge
    to the reasonable royalty award and remand to the dis-
    trict court for further proceedings as to the lost profits.
    We also reinstate sections I, II, and IV of our decision in
    WesternGeco I and sections I and II of our decision in
    WesternGeco II, which were not affected by either the
    initial vacatur and remand from the Supreme Court, 
    136 S. Ct. 2486
    (2016), or the Supreme Court’s subsequent
    decision in WesternGeco III.
    AFFIRMED-IN-PART, VACATED-IN-PART, AND
    REMANDED
    COSTS
    No costs.