Apple Inc. v. Zipit Wireless, Inc. ( 2022 )


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  • Case: 21-1760   Document: 42     Page: 1   Filed: 04/18/2022
    United States Court of Appeals
    for the Federal Circuit
    ______________________
    APPLE INC.,
    Plaintiff-Appellant
    v.
    ZIPIT WIRELESS, INC.,
    Defendant-Appellee
    ______________________
    2021-1760
    ______________________
    Appeal from the United States District Court for the
    Northern District of California in No. 5:20-cv-04448-EJD,
    Judge Edward J. Davila.
    ______________________
    Decided: April 18, 2022
    ______________________
    LAUREN ANN DEGNAN, Fish & Richardson PC, Wash-
    ington, DC, argued for plaintiff-appellant. Also repre-
    sented by ASHLEY BOLT, EDA STARK, BENJAMIN THOMPSON,
    Atlanta, GA; BENJAMIN ELACQUA, Houston, TX.
    CORTNEY ALEXANDER, Kent & Risley LLC, Alpharetta,
    GA, argued for defendant-appellee. Also represented by
    STEPHEN ROBERT RISLEY.
    ______________________
    Before HUGHES, MAYER, and STOLL, Circuit Judges.
    Case: 21-1760     Document: 42      Page: 2      Filed: 04/18/2022
    2                            APPLE INC.   v. ZIPIT WIRELESS, INC.
    STOLL, Circuit Judge.
    Apple Inc. appeals from a judgment of the U.S. District
    Court for the Northern District of California dismissing its
    complaint for declaratory judgment of noninfringement
    against Zipit Wireless, Inc. for lack of personal jurisdiction.
    The district court held that it would be unreasonable to ex-
    ercise personal jurisdiction over Zipit based on the nature
    of Zipit’s communications with Apple in the Northern Dis-
    trict. Specifically, the district court read our precedent as
    applying a bright-line rule that patent infringement notice
    letters and related communications can never form the ba-
    sis for personal jurisdiction. We agree with Apple that the
    district court erred in this regard.
    Guided by the Supreme Court and our own precedent,
    we conclude, as the district court likely would have absent
    its erroneous interpretation of our precedent, that Zipit is
    subject to specific personal jurisdiction in the Northern
    District of California for purposes of Apple’s declaratory
    judgment action. We therefore reverse the judgment dis-
    missing Apple’s declaratory judgment complaint and re-
    mand for further proceedings.
    BACKGROUND
    I
    Zipit is a Delaware corporation with a principal place
    of business in Greenville, South Carolina, and with each of
    its fourteen employees located in South Carolina. Zipit is
    the assignee of U.S. Patent Nos. 7,292,870 and 7,894,837
    (collectively, the “patents-in-suit”), which are generally di-
    rected to wireless instant messaging devices that use Wi-Fi
    to send and receive instant messages.
    The parties’ communications regarding the patents-in-
    suit and the instant lawsuit date back to at least 2013,
    when Zipit first contacted Apple in the Northern District of
    California. Over the course of three years, the parties ex-
    changed several rounds of correspondence and met in
    Case: 21-1760       Document: 42        Page: 3   Filed: 04/18/2022
    APPLE INC.   v. ZIPIT WIRELESS, INC.                           3
    person at Apple’s Cupertino headquarters located in the
    Northern District. The parties discussed, among other
    things, the possibility of Apple buying or licensing the pa-
    tents-in-suit from Zipit; the status and perceived strength
    of ongoing inter partes review proceedings involving the
    patents-in-suit; and technical details regarding potential
    infringement (and allegations of willful infringement). Ul-
    timately, these discussions led to Zipit filing a patent in-
    fringement action against Apple.
    The record before the district court 1 indicates that Zipit
    first traveled to Apple’s Cupertino headquarters on Decem-
    ber 3, 2013. J.A. 146. Following this in-person meeting,
    the parties had “at least” four “detailed calls” in December
    2013, February 2014, and March 2014. Id. During these
    meetings and calls, Apple and Zipit discussed licensing the
    patents-in-suit and Apple’s contentions that it “does not
    practice any Zipit patent claims” and that the “patents[-in-
    suit] are invalid.” Id. Indeed, the parties went so far as to
    exchange competing drafts of a license agreement in Au-
    gust and September 2014 but ultimately did not reach any
    1    On January 25, 2022, we granted Apple’s opposed
    motion to file a supplemental appendix. See Order, Apple
    Inc. v. Zipit Wireless, Inc., No. 21-1760, ECF No. 38
    (Fed. Cir. Jan. 25, 2022). The supplemental appendix in-
    cludes a portion of a letter from Zipit’s outside counsel to
    Apple’s general counsel that was not part of the record be-
    fore the district court. In its briefing on the motion to sup-
    plement, Apple informed the court that the limited purpose
    of this non-record letter was to demonstrate that it was not
    misleading the court in its opening brief on appeal when it
    stated that Zipit initiated the contacts, an allegation that
    Zipit had implied in its responsive brief. Because this let-
    ter was not part of the district court record, we do not con-
    sider the substance of this letter beyond this limited
    purpose identified by Apple.
    Case: 21-1760    Document: 42      Page: 4      Filed: 04/18/2022
    4                           APPLE INC.   v. ZIPIT WIRELESS, INC.
    agreement. Zipit traveled to Apple’s Cupertino offices for
    a second in-person meeting to continue discussions on Jan-
    uary 13, 2015. Id.
    Following the January 2015 meeting, Apple and Zipit
    exchanged numerous letters and emails throughout 2015
    and 2016. The first email, dated July 18, 2015, was sent
    by Mr. Stephen Risley (Zipit’s outside counsel) regarding
    “Apple’s Ongoing Infringement” of the patents-in-suit.
    J.A. 144. This email, directed to Apple’s in-house counsel
    (Mr. Rudhir Patel) sought a “definitive response” from Ap-
    ple regarding the parties’ ongoing discussion of Apple’s
    “purchase and/or license” of the patents-in-suit. Id. Refer-
    encing a discussion that had taken place the day prior,
    Mr. Risley also attached for Apple’s review Zipit’s opposi-
    tion brief to a petition for IPR of the ’837 patent. He also
    noted that additional briefs as to other patents were forth-
    coming. Mr. Risley concluded: “I understand that Apple
    will review Zipit’s IPR briefs and respond to Zipit in 1-2
    weeks.” Id.
    Apple responded two months later. On September 25,
    2015, Mr. Patel sent Mr. Risley a letter reiterating Apple’s
    view that it “does not need a license” to the patents-in-suit
    “because Apple does not practice any” claims of the pa-
    tents-in-suit and the claims are invalid. J.A. 146. In de-
    scribing its grounds for noninfringement, Apple referred
    specifically to deficiencies in claim charts it had received
    from Zipit. See id. Apple also stated that its view that the
    claims were invalid was “confirmed by [its] review of the
    materials before the [Patent Trial and Appeal Board], and
    additional prior art not being considered” in the pending
    IPRs. J.A. 147.
    The discussions escalated. On October 14, 2015,
    Mr. Risley sent a responsive letter addressed to Mr. Patel
    (with Apple’s Cupertino office listed on the address line)
    regarding “Apple’s Ongoing Willful Infringement” of the
    patents-in-suit.   J.A. 141. In the letter, Mr. Risley
    Case: 21-1760       Document: 42        Page: 5   Filed: 04/18/2022
    APPLE INC.   v. ZIPIT WIRELESS, INC.                           5
    conveyed Zipit’s “continue[d]” belief that “Apple has and
    continues to willfully infringe” the patents-in-suit. Id. He
    concluded the letter by referencing willful infringement a
    second time: “Zipit is confident that if it becomes neces-
    sary a Court will view your September 25, 2015 [letter] as
    nothing more than a transparent attempt by Apple to jus-
    tify Apple’s past, present, and future willful infringement
    of Zipit’s patents.” Id. Apple responded to this letter on
    December 8, 2015. J.A. 151.
    Mr. Risley sent another email to Mr. Patel five months
    later on April 7, 2016. In this email, Mr. Risley informed
    Apple that the Board had “confirmed the patentability of
    all claims” of the patents-in-suit. J.A. 139. He concluded
    the letter by once again stating Zipit’s belief “that Apple
    has and continues to infringe” the patents-in-suit. Id.
    The parties thereafter had another phone call on
    April 26, 2016, after which Mr. Patel, on May 2, 2016, re-
    sponded in writing to Zipit’s latest letter. J.A. 150. Mr. Pa-
    tel reiterated Apple’s belief that the patents-in-suit are
    invalid notwithstanding the Board’s patentability determi-
    nation in the IPR proceedings. In response to Zipit’s con-
    tinued allegations of infringement, Apple explained that it
    had “repeatedly refuted those allegations” and that Zipit
    had failed to substantively respond to Apple’s positions in
    this regard. J.A. 151. The letter concluded: “Should Zipit
    substantively respond to Apple’s explanation of why Ap-
    ple’s products do not fall within the scope of [the patents-
    in-suit], Apple will further consider Zipit’s positions.” Id.
    II
    Over four years later, on June 11, 2020, Zipit sued Ap-
    ple in the Northern District of Georgia, accusing Apple of
    infringing the patents-in-suit. J.A. 16 (Compl. ¶ 2) (citing
    Compl., Zipit Wireless, Inc. v. Apple Inc., Civil Action
    No. 1:20-cv-02488-ELR (N.D. Ga. June 11, 2020), ECF
    No. 1). Zipit voluntarily dismissed the case without preju-
    dice two weeks later on June 24, 2020. J.A. 16 (Compl. ¶ 3).
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    6                           APPLE INC.   v. ZIPIT WIRELESS, INC.
    Nine days later, on July 3, 2020, Apple filed a complaint in
    the Northern District of California seeking a declaratory
    judgment of noninfringement of the patents-in-suit.
    Zipit moved to dismiss Apple’s complaint for lack of
    personal jurisdiction under Federal Rule of Civil Proce-
    dure 12(b)(2). On February 12, 2021, the district court
    granted Zipit’s motion, holding that it lacked specific per-
    sonal jurisdiction over Zipit (general jurisdiction was not
    asserted). Apple Inc. v. Zipit Wireless, Inc., Case No. 5:20-
    cv-04448-EJD, 
    2021 WL 533754
     (N.D. Cal. Feb. 12, 2021)
    (Judgment Op.).
    The court concluded that Apple had established the
    requisite minimum contacts, highlighting that Zipit sent
    “multiple letters and claim charts accusing Apple of patent
    infringement” and in fact had “travel[ed] to Apple’s offices
    in California to discuss these accusations.” Id. at *3. This,
    the court determined, made the exercise of specific per-
    sonal jurisdiction over Zipit “presumptively reasonable.”
    Id. (quoting Xilinx, Inc. v. Papst Licensing GmbH & Co.,
    
    848 F.3d 1346
    , 1356 (Fed. Cir. 2017)).
    The court then analyzed whether Zipit had established
    a “compelling case” that the exercise of jurisdiction would
    be unreasonable. After analyzing each of the factors set
    forth in Burger King Corp. v. Rudzewicz, 
    471 U.S. 462
    ,
    475–77 (1985), the court concluded that Zipit had not done
    so. Judgment Op., 
    2021 WL 533754
    , at *3–4. Specifically,
    the court found that “the majority of [the] reasonableness
    factors weigh in favor of adjudicating in California or, at
    the least, do not weigh significantly in favor of either
    party,” and therefore jurisdiction over Zipit would not be
    unreasonable. Id. at *4.
    The court went on to explain, however, that the Federal
    Circuit has held that “the exercise of personal jurisdiction
    . . . would be unconstitutional when ‘[a]ll of the contacts
    were for the purpose of warning against infringement or
    negotiating license agreements, and [the defendant] lacked
    Case: 21-1760       Document: 42        Page: 7   Filed: 04/18/2022
    APPLE INC.   v. ZIPIT WIRELESS, INC.                           7
    a binding obligation in the forum.’” Id. (alterations in orig-
    inal) (quoting Levita Magnetics Int’l Corp. v. Attractive
    Surgical, LLC, Case No. 19-cv-04065-JSW, 
    2020 WL 4580504
    , at *6 (N.D. Cal. Apr. 1, 2020), which in turn
    quotes Breckenridge Pharm., Inc. v. Metabolite Lab’ys, Inc.,
    
    444 F.3d 1356
    , 1364 (Fed. Cir. 2006)). The court thus de-
    termined that the exercise of jurisdiction over Zipit would
    be unreasonable because of “Zipit’s lack of binding obliga-
    tions tying it to California and because Zipit’s contacts with
    California all related to the attempted resolution of the sta-
    tus of” the patents-in-suit, i.e., “for the purpose of warning
    against infringement.” Id. at *4. Accordingly, despite de-
    termining that Apple had established that minimum con-
    tacts existed with the Northern District of California and
    that Zipit had not shown the exercise of jurisdiction would
    be unreasonable under Supreme Court precedent, the dis-
    trict court dismissed Apple’s declaratory judgment action
    for lack of jurisdiction.
    Apple appeals. We have jurisdiction under 
    28 U.S.C. § 1295
    (a)(1).
    DISCUSSION
    The sole issue in this case is whether the district court
    erred in dismissing Apple’s declaratory judgment action for
    lack of specific personal jurisdiction over Zipit. “Personal
    jurisdiction is a question of law that we review de novo.”
    Xilinx, 848 F.3d at 1352 (quoting Autogenomics, Inc. v. Ox-
    ford Gene Tech. Ltd., 
    566 F.3d 1012
    , 1016 (Fed. Cir. 2009)).
    In reviewing a Rule 12(b)(2) dismissal for lack of personal
    jurisdiction, we “accept the uncontroverted allegations in
    [Apple’s] complaint as true and resolve any factual conflicts
    in the affidavits in [Apple’s] favor.” 
    Id.
     (quoting Avocent
    Huntsville Corp. v. Aten Int’l Co., 
    552 F.3d 1324
    , 1329
    (Fed. Cir. 2008)); see also Marvix Photo, Inc. v. Brand
    Techs., Inc., 
    647 F.3d 1218
    , 1223 (9th Cir. 2011).
    Determining whether jurisdiction exists over Zipit (an
    out-of-state defendant) in the Northern District of
    Case: 21-1760      Document: 42      Page: 8      Filed: 04/18/2022
    8                             APPLE INC.   v. ZIPIT WIRELESS, INC.
    California involves two inquiries: whether California’s
    long-arm statute permits service of process and whether
    assertion of personal jurisdiction comports with due pro-
    cess. Xilinx, 848 F.3d at 1352–53. Because “California’s
    long-arm statute permits service of process to the full ex-
    tent allowed by the due process clauses of the United States
    Constitution,” the two inquiries become one. Id. at 1353
    (citing 
    Cal. Civ. Proc. Code § 410.10
     (West)). That is, we
    need only consider “whether jurisdiction comports with due
    process.” 
    Id.
     (quoting Inamed Corp. v. Kuzmak, 
    249 F.3d 1356
    , 1360 (Fed. Cir. 2001)).
    “[F]oreseeability . . . is critical to due process analysis,”
    and the Supreme Court has made clear that the focus is on
    whether a given defendant’s “conduct and connection with
    the forum State are such that he should reasonably antici-
    pate being haled into court there.” Burger King, 
    471 U.S. at 474
     (quoting World-Wide Volkswagen Corp. v. Woodson,
    
    444 U.S. 286
    , 297 (1980)). The Supreme Court has outlined
    three factors relevant to specific personal jurisdiction. In
    ascertaining whether the exercise of specific personal juris-
    diction is appropriate in a given case, we con-
    sider: (1) whether the defendant “purposefully directed”
    its activities at residents of the forum; and (2) whether the
    claim “arise[s] out of or relate[s] to” the defendant’s activi-
    ties within the forum. 
    Id.
     at 472–73 (first quoting Keeton
    v. Hustler Mag., Inc., 
    465 U.S. 770
    , 774 (1984); and then
    quoting Helicopteros Nacionales de Colombia, S.A. v. Hall,
    
    466 U.S. 408
    , 414 (1984)); see also Jack Henry & Assocs.,
    Inc. v. Plano Encryption Techs. LLC, 
    910 F.3d 1199
    , 1204
    (Fed. Cir. 2018). We also consider (3) whether assertion of
    personal jurisdiction is reasonable and fair. World-Wide
    Volkswagen, 
    444 U.S. at
    291–92; see also Burger King,
    
    471 U.S. at
    476–78; Jack Henry, 910 F.3d at 1204.
    “The first two factors comprise the ‘minimum contacts’
    portion of the jurisdictional framework . . . .” Jack Henry,
    910 F.3d at 1204. The third factor assesses the reasonable-
    ness and fairness of exercising jurisdiction over an out-of-
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    APPLE INC.   v. ZIPIT WIRELESS, INC.                           9
    state defendant with an eye toward ensuring that the ex-
    ercise of jurisdiction does not offend the traditional notions
    of “fair play and substantial justice.” Burger King, 
    471 U.S. at
    476–77 (quoting Int’l Shoe Co. v. Washington, 
    326 U.S. 310
    , 320 (1945)) (the Burger King factors, discussed below).
    Where minimum contacts are satisfied, the exercise of ju-
    risdiction is “presumptively reasonable.”         See Xilinx,
    848 F.3d at 1356. Thus, the burden is placed on the de-
    fendant to present a “compelling case that the presence of
    some other considerations would render jurisdiction unrea-
    sonable.” Burger King, 
    471 U.S. at 477
    .
    I
    We begin by considering Zipit’s contacts with Califor-
    nia. The district court succinctly summarized Zipit’s con-
    tacts as follows: Zipit “sen[t] multiple letters and claim
    charts accusing Apple of patent infringement and also
    travel[ed] to Apple’s offices in California to discuss these
    accusations.” Judgment Op., 
    2021 WL 533754
    , at *3. The
    court explained that “[b]y doing so, Zipit . . . directed its ac-
    tivities to California” further noting that “because Apple’s
    declaratory judgment claim directly stems from these en-
    forcement efforts, Apple’s claim also arises out of Zipit’s
    contacts with California.” 2 
    Id.
     The court, relying largely
    on our decision in Xilinx, thus determined that minimum
    contacts were satisfied. We agree.
    In Xilinx, the defendant-patentee sent two notice let-
    ters to the declaratory-judgment plaintiff and eventually
    traveled to California to meet with the plaintiff to discuss
    allegations of infringement and potential licensing of the
    patents. 848 F.3d at 1350–51. We explained that the de-
    fendant had “purposefully directed its activities to
    2 Zipit does not dispute that Apple’s declaratory
    judgment action arises out of Zipit’s contacts with Califor-
    nia.
    Case: 21-1760    Document: 42      Page: 10      Filed: 04/18/2022
    10                           APPLE INC.   v. ZIPIT WIRELESS, INC.
    California when it sent multiple notice letters to [the plain-
    tiff] and traveled there to discuss the [plaintiff’s] alleged
    patent infringement and potential licensing arrange-
    ments.” Id. at 1354. We readily concluded that there was
    “no question that [the defendant] ha[d] the required mini-
    mum contacts with California.” Id.
    So too here. Indeed, Xilinx is virtually indistinguisha-
    ble from the facts of this case, where Zipit likewise sent
    multiple communications to Apple in California and trav-
    eled twice to California to discuss allegations of infringe-
    ment and the prospect of Apple licensing or purchasing the
    patents-in-suit. And our decision in Xilinx is not alone in
    determining that minimum contacts were satisfied on sim-
    ilar facts. See, e.g., Elecs. for Imaging, Inc. v. Coyle,
    
    340 F.3d 1344
    , 1350–51 (Fed. Cir. 2003) (determining that
    telephone calls as well as an in-person meeting in the fo-
    rum state “for the purpose of demonstrating the technology
    underlying” the asserted patents made a “prima facie case
    that defendants . . . purposefully directed their activities to
    California”); Deprenyl Animal Health, Inc. v. Univ. of To-
    ronto Innovations Found., 
    297 F.3d 1343
    , 1352 (Fed. Cir.
    2002) (determining that telephone calls, letters, and two
    in-person meetings in the forum state for purposes of nego-
    tiating a license agreement “constitute[d] sufficient mini-
    mum contacts”); cf. Walden v. Fiore, 
    571 U.S. 277
    , 285
    (2014) (“[P]hysical entry into the State—either by the de-
    fendant in person or through an agent, goods, mail, or some
    other means—is certainly a relevant contact.”).
    Zipit argues that minimum contacts are not satisfied
    here, relying principally on this court’s decision in Autoge-
    nomics. In Autogenomics, the defendant-patentee sent a
    notice letter to the declaratory-judgment plaintiff, the
    plaintiff “expressed interest in taking a license,” and two of
    the patentee’s representatives flew to California (the forum
    state) to meet with the plaintiff’s representatives. 
    566 F.3d at
    1014–15. Based on the facts of the case and the nature
    of the specific communications at hand, we determined
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    APPLE INC.   v. ZIPIT WIRELESS, INC.                          11
    that the plaintiff “failed to allege sufficient activities
    ‘relat[ing] to the validity and enforceability of the patent’
    in addition to the cease-and-desist communications” to
    demonstrate minimum contacts. 
    Id.
     (alteration in original)
    (quoting Avocent, 
    552 F.3d at 1336
    ).
    Zipit argues (and Apple suggested) that Autogenomics
    created a “bright-line rule . . . that cease-and-desist letters
    and related in-person discussions cannot support [mini-
    mum contracts for] personal jurisdiction.” Appellee’s
    Br. 15–16; Appellant’s Br. 26 n.6. As an initial matter, we
    note that there are material factual distinctions between
    Autogenomics and this case. 3 More importantly though,
    our precedent as a whole—including decisions both before
    and after Autogenomics—supports our determination that
    minimum contacts are satisfied here. See, e.g., Elecs. for
    Imaging, 
    340 F.3d at
    1350–51; Deprenyl, 
    297 F.3d at 1352
    ;
    Xilinx, 848 F.3d at 1354. Indeed, this court in Red Wing
    Shoe Co. v. Hockerson-Halberstadt, Inc.—decided prior to
    3   For example, unlike in Autogenomics, here Zipit:
    (1) kept Apple apprised of the status of ongoing IPRs of the
    patents-in-suit, cf. Deprenyl, 
    297 F.3d at 1352
     (finding “sig-
    nificant” to purposeful availment the fact that the patentee
    kept the plaintiff “apprised of the prosecution status of the
    application that matured into” the asserted patent); and
    (2) escalated its allegations of infringement, going so far as
    twice describing Apple’s infringement as willful, cf. Trim-
    ble Inc. v. PerDiemCo LLC, 
    997 F.3d 1147
    , 1156–57
    (Fed. Cir. 2021) (considering amplified threats of infringe-
    ment—e.g., the patentee identifying additional patents and
    accusing more products of infringement, as well as identi-
    fying counsel it had retained, naming venue, and providing
    a draft complaint to the plaintiff—relevant to purposeful
    availment); Inamed, 
    249 F.3d at 1361
     (“The fact that [the
    patentee] chose to use the term ‘willful’ in conjunction with
    ‘infringement’ [in its notice letter] is significant.”).
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    12                           APPLE INC.   v. ZIPIT WIRELESS, INC.
    Autogenomics—acknowledged that “cease-and-desist let-
    ters alone are often substantially related to the cause of ac-
    tion (thus providing minimum contacts).” 
    148 F.3d 1355
    ,
    1360 (Fed. Cir. 1998).
    Thus, in view of at least Xilinx, Electronics for Imaging,
    Deprenyl, and Red Wing Shoe, we agree with the district
    court that Zipit has the requisite minimum contacts with
    California.
    II
    Having determined that Zipit purposefully directed its
    activities at California, we now consider whether Zipit has
    “present[ed] a compelling case that the presence of some
    other considerations would render jurisdiction unreasona-
    ble.” Burger King, 
    471 U.S. at 477
    . For the reasons below,
    we conclude that Zipit has not done so.
    A
    We begin by addressing an error in the district court’s
    determination that the exercise of jurisdiction would be un-
    reasonable. After analyzing and weighing each of the
    Burger King factors, the court initially determined that
    Zipit had not shown that the exercise of jurisdiction would
    be unreasonable. It went on, however, to conclude that it
    would be unreasonable to exercise jurisdiction over Zipit
    under our court’s precedent solely because “Zipit’s contacts
    with California all related to the attempted resolution of
    the status of” the patents-in-suit, i.e., “for the purpose of
    warning against infringement.” Judgment Op., 
    2021 WL 533754
    , at *4. This was error. As we explained most re-
    cently in Trimble, “there is no general rule that demand
    letters can never create specific personal jurisdiction.”
    997 F.3d at 1156.
    Zipit traces our court’s treatment of notice letters back
    to Red Wing Shoe. There, we explained that “[p]rinciples
    of fair play and substantial justice afford a patentee suffi-
    cient latitude to inform others of its patent rights without
    Case: 21-1760      Document: 42         Page: 13   Filed: 04/18/2022
    APPLE INC.   v. ZIPIT WIRELESS, INC.                          13
    subjecting itself to jurisdiction in a foreign forum.”
    
    148 F.3d at
    1360–61. The policy behind Red Wing Shoe is
    simple: a right holder should be permitted to send a notice
    letter to a party in a particular forum to try to settle dis-
    putes without being haled into court in that forum. Under
    our precedent (as well as that of our sister circuits), this
    policy must be considered in determining whether the ex-
    ercise of jurisdiction would be reasonable and fair.
    This policy is no doubt relevant. As we explained in
    Red Wing Shoe, the “policy favoring settlement is manifest
    in . . . the Federal Rules of Evidence,” 
    id.
     at 1361 (citing
    Fed. R. Evid. 408), as well as Supreme Court precedent di-
    recting courts to consider “the interstate judicial system’s
    interest in obtaining the most efficient resolution of contro-
    versies,” 
    id.
     (quoting World-Wide Volkswagen, 
    444 U.S. at 292
    ). While Red Wing Shoe has been interpreted as rest-
    ing on “policy considerations unique to the patent context,”
    Silent Drive, Inc. v. Strong Indus., Inc., 
    326 F.3d 1194
    , 1206
    (Fed Cir. 2003), this settlement-promoting policy perme-
    ates other areas of law as well, see Trimble, 997 F.3d
    at 1155 (first citing Yahoo! Inc. v. La Ligue Contre le Rac-
    isme et l’Antisemitisme, 
    433 F.3d 1199
    , 1208 (9th Cir. 2006)
    (en banc); and then citing Oriental Trading Co. v. Firetti,
    
    236 F.3d 938
    , 943 (8th Cir. 2001)). It is not a patent-spe-
    cific consideration.
    For example, an en banc majority of the Ninth Circuit
    in Yahoo! considered a letter sent to Yahoo!’s headquarters
    in California alleging that Yahoo! was violating French
    law. 
    433 F.3d at 1202
    . The majority ultimately deter-
    mined that this letter, by itself, was not a sufficient basis
    for jurisdiction, explaining that
    [t]here are strong policy reasons to encourage cease
    and desist letters. They are normally used to warn
    an alleged rights infringer that its conduct, if con-
    tinued, will be challenged in a legal proceeding,
    and to facilitate resolution of a dispute without
    Case: 21-1760     Document: 42     Page: 14      Filed: 04/18/2022
    14                           APPLE INC.   v. ZIPIT WIRELESS, INC.
    resort to litigation. If the price of sending a cease
    and desist letter is that the sender thereby subjects
    itself to jurisdiction in the forum of the alleged
    rights infringer, the rights holder will be strongly
    encouraged to file suit in its home forum without
    attempting first to resolve the dispute informally
    by means of a letter.
    
    Id. at 1208
     (collecting cases); see also, e.g., Int’l Med. Grp.
    v. Am. Arb. Ass’n, 
    312 F.3d 833
    , 846–47 (7th Cir. 2002)
    (holding that exercise of specific personal jurisdiction over
    defendant “would not comport with substantial justice and
    fair play” where defendant sent a single letter threatening
    to pursue arbitration if insurance company did not pay
    claims, and only sending additional communications into
    the forum at the declaratory-judgment plaintiff’s request);
    cf. Halliburton Energy Servs., Inc. v. Ironshore Specialty
    Ins. Co., 
    921 F.3d 522
    , 528–29, 542 (5th Cir. 2019) (holding
    that letter sent to plaintiff “demanding payment” to cover
    damage incurred as the result of an explosion was “not
    enough to show minimum contacts with Texas”); 
    id.
     at 542
    n.18 (collecting cases).
    But this policy cannot control the inquiry—it must be
    considered together with the other Burger King factors,
    consistent with the Supreme Court’s “directive to ‘consider
    a variety of interests’ in assessing whether jurisdiction
    would be fair.” Jack Henry, 910 F.3d at 1206 (quoting Bris-
    tol-Myers Squibb Co. v. Superior Ct. of Cal., 
    137 S. Ct. 1773
    , 1780 (2017)); Burger King, 
    471 U.S. at
    478–79 (“The
    Court long ago rejected the notion that personal jurisdic-
    tion might turn on ‘mechanical’ tests.”). Indeed, we have
    repeatedly rejected the notion that the sending of a notice
    letter “can never provide specific jurisdiction.” Jack Henry,
    910 F.3d at 1203; id. at 1206; Genetic Veterinary Scis., Inc.
    v. LABOKLIN, GmbH & Co., 
    933 F.3d 1302
    , 1312
    (Fed. Cir. 2019); Trimble, 997 F.3d at 1156. So too have
    our sister circuits. See, e.g., Yahoo!, 
    433 F.3d at 1208
     (“This
    is not to say that a cease and desist letter can never be the
    Case: 21-1760      Document: 42         Page: 15   Filed: 04/18/2022
    APPLE INC.   v. ZIPIT WIRELESS, INC.                          15
    basis for personal jurisdiction.”); Def. Distributed
    v. Grewal, 
    971 F.3d 485
    , 491, 496, 496 n.10 (5th Cir. 2020)
    (holding minimum contacts satisfied where the totality of
    contacts with the forum involved a cease-and-desist order
    focused on activities occurring in the forum).
    In this case, the district court, not having the benefit of
    our recent decision in Trimble, erred by not considering the
    settlement-promoting policy underlying Red Wing Shoe as
    but one of many considerations in its overall analysis of the
    Burger King factors. See Trimble, 997 F.3d at 1157–59
    (considering this policy alongside the other Burger King
    factors). Specifically, the district court erred in reading our
    precedent as creating a bright-line rule that communica-
    tions directed to “the attempted resolution” of the parties’
    dispute regarding the patents-in-suit trumps all other con-
    siderations of fairness and reasonableness. Although some
    of our earlier precedent relying on Red Wing Shoe suggests
    that there is such a bright-line rule, see, e.g., Avocent,
    
    552 F.3d at 1340
    ; Breckenridge, 
    444 F.3d at 1362
    ; Silent
    Drive, 
    326 F.3d at 1206
    , Supreme Court precedent (both
    pre- and post-Red Wing Shoe) has made clear that jurisdic-
    tional inquiries cannot rest on such bright-line rules—
    there are no “talismanic jurisdictional formulas.” Burger
    King, 
    471 U.S. at 485
    . Rather, “‘the facts of each case must
    [always] be weighed’ in determining whether personal ju-
    risdiction would comport with ‘fair play and substantial
    justice.’” 
    Id.
     at 485–86 (alteration in original) (quoting
    Kulko v. Superior Ct. of Cal., 
    436 U.S. 84
    , 92 (1978)); Bris-
    tol-Myers Squibb, 137 S. Ct. at 1780 (“In determining
    whether personal jurisdiction is present, a court must con-
    sider a variety of interests.”).
    B
    We now consider the “variety of interests” the Supreme
    Court has directed us to consider in assessing whether the
    exercise of jurisdiction would be unreasonable. Because we
    agree with the district court that minimum contacts are
    Case: 21-1760      Document: 42      Page: 16      Filed: 04/18/2022
    16                             APPLE INC.   v. ZIPIT WIRELESS, INC.
    satisfied, Zipit bears the burden to present a compelling
    case that jurisdiction would be unreasonable. We conclude
    that Zipit has not met this burden. The district court came
    to this same conclusion initially, but erroneously treated
    the settlement policy discussed above as controlling. In an-
    alyzing these factors de novo, we consider Red Wing Shoe’s
    settlement-promoting policy alongside each of the Burger
    King factors:
    [1] “the burden on the defendant,” [2] “the forum
    State’s interest in adjudicating the dispute,”
    [3] “the plaintiff’s interest in obtaining convenient
    and effective relief,” [4] “the interstate judicial sys-
    tem’s interest in obtaining the most efficient reso-
    lution of controversies,” and [5] the “shared
    interest of the several States in furthering funda-
    mental substantive social policies.”
    
    471 U.S. at 477
     (quoting World-Wide Volkswagen, 
    444 U.S. at 292
    ).
    First, we consider the burden on Zipit of litigating in
    California, which is “always a primary concern.” World-
    Wide Volkswagen, 
    444 U.S. at 292
    . Frank Greer, Zipit’s
    President and CEO and one of the named inventors on the
    patents-in-suit, stated in his declaration in support of
    Zipit’s motion to dismiss that all of Zipit’s fourteen employ-
    ees are located in South Carolina. These employees include
    another of the named inventors, Ralph Heredia, Zipit’s
    Vice President of Business Development. There is no real
    dispute that both Mr. Greer and Mr. Heredia “have infor-
    mation relevant to the patents-in-suit” and the underlying
    litigation. J.A. 111 (Greer Decl. ¶ 8). Mr. Greer contends
    that it “would be significantly more burdensome for” both
    him and Mr. Heredia, “leaders of Zipit’s management
    team, to litigate this case in California than in Zipit’s home
    state of South Carolina due to the added expense of travel
    and time away from work.” Id. ¶ 14.
    Case: 21-1760      Document: 42         Page: 17   Filed: 04/18/2022
    APPLE INC.   v. ZIPIT WIRELESS, INC.                          17
    We agree with the district court that “adjudication in
    California will create some burden for Zipit,” given its ties
    to South Carolina. Judgment Op., 
    2021 WL 533754
    , at *3.
    But in view of the limited evidence Zipit presented—only
    Mr. Greer’s declaration with general allegations of incon-
    venience—we are not convinced that this would be so un-
    reasonably burdensome as to be unconstitutional. It
    merely shows inconvenience to Zipit, a concern that can be
    addressed by challenging improper venue rather than ar-
    guing, as it does here, that the exercise of jurisdiction is
    unconstitutional. See Burger King, 
    471 U.S. at 477
     (ex-
    plaining that fairness considerations for litigating in a for-
    eign forum “may be accommodated through means short of
    finding jurisdiction unconstitutional,” such as “seek[ing] a
    change of venue”). Moreover, Zipit’s evidence in support of
    hardship is a single sentence in Mr. Greer’s declaration.
    We view this “general assertion of hardship, without sup-
    porting evidence”—beyond the single sentence—“as unper-
    suasive.” Breckenridge, 
    444 F.3d at 1367
    .
    Additionally, we note that “[r]epresentatives from
    [Zipit] traveled to California to meet with [Apple] in person
    to discuss [Zipit’s] infringement contentions and licensing
    offer with respect to the patents-in-suit.” Xilinx, 848 F.3d
    at 1357. As we explained in Xilinx, “territorial presence
    frequently will enhance a potential defendant’s affiliation
    with a State and reinforce the reasonable foreseeability of
    suit there.” Id. (quoting Burger King, 
    471 U.S. at 476
    ).
    This “foreseeability . . . is critical to due process analysis.”
    Burger King, 
    471 U.S. at 474
     (quoting World-Wide
    Volkswagen, 
    444 U.S. at 297
    ).
    Finally, Zipit suggests in its appeal brief that it could
    not have foreseen being haled into court in California be-
    cause four years lapsed between its last contact with Apple
    in California (2016) and Apple’s filing of its declaratory
    judgment action (2020). See Appellee’s Br. 2–3, 25–26. But
    Zipit’s argument skips over an important point—it is Zipit
    who reignited the parties’ contacts by filing suit for patent
    Case: 21-1760    Document: 42      Page: 18      Filed: 04/18/2022
    18                           APPLE INC.   v. ZIPIT WIRELESS, INC.
    infringement in Georgia in 2020. After moving to dismiss
    its action in Georgia without prejudice, Zipit cannot credi-
    bly assert that it could not have reasonably foreseen that
    Apple would respond in kind by filing a declaratory judg-
    ment claim, and that it would do so in its home state of
    California given Zipit’s earlier contacts with the forum
    state. However stale Zipit’s contacts might have become
    absent intervening action by Zipit, they were ripe when Ap-
    ple filed its declaratory judgment action.
    Turning to the second factor—California’s interest in
    adjudicating the underlying patent infringement dispute—
    we have previously recognized that California has “definite
    and well-defined interests in commerce and scientific de-
    velopment,” and that it has “a substantial interest in pro-
    tecting its residents from unwarranted claims of patent
    infringement.” Xilinx, 848 F.3d at 1356 (first quoting Viam
    Corp. v. Iowa Exp.-Imp. Trading Co., 
    84 F.3d 424
    , 430
    (Fed. Cir. 1996); and then quoting Elecs. for Imaging,
    
    340 F.3d at 1352
    )); accord Trimble, 997 F.3d at 1158; see
    McGee v. Int’l Life Ins. Co., 
    355 U.S. 220
    , 223 (1957) (ex-
    plaining that states have “a manifest interest in providing
    effective means of redress for [their] residents”). Zipit does
    not dispute that California has such an interest. See Ap-
    pellee’s Br. 34.
    The third factor asks us to consider Apple’s interest in
    obtaining convenient and effective relief. As the district
    court correctly explained, “Apple, ‘which is headquartered
    in California, indisputably has an interest in protecting it-
    self from patent infringement by obtaining relief from a
    nearby federal court in its home forum.’” Judgment Op.,
    
    2021 WL 533754
    , at *4 (quoting Xilinx, 848 F.3d at 1356
    (cleaned up)); accord Trimble, 997 F.3d at 1158. We agree
    with the district court’s assessment of this factor.
    Fourth, we consider “the interstate judicial system’s in-
    terest in obtaining the most efficient resolution of contro-
    versies.” Burger King, 
    471 U.S. at 477
    . Underlying this
    Case: 21-1760      Document: 42         Page: 19   Filed: 04/18/2022
    APPLE INC.   v. ZIPIT WIRELESS, INC.                          19
    consideration is the settlement-promoting policy discussed
    above (and which the district court treated as dispositive).
    Indeed, as we explained in Red Wing Shoe, this important
    settlement-promoting policy “squarely invokes” the fourth
    Burger King factor. 
    148 F.3d at 1361
    ; cf. Yahoo!, 
    433 F.3d at 1208
    .
    Here, we have no doubt that Zipit’s initial contacts with
    California can be fairly viewed as attempting to settle its
    dispute with Apple out of court, e.g., by way of a patent li-
    cense. This is an important fact we consider and weigh in
    Zipit’s favor. We note that Zipit’s communications with Ap-
    ple arguably went further, extending over the course of sev-
    eral years and reaching beyond license negotiations to
    include the sale of its patents. After Apple told Zipit it
    “d[id] not need a license to the” patents-in-suit in 2015,
    J.A. 146, Zipit continued to assert that Apple was infring-
    ing the patents-in-suit for many months thereafter. Over-
    all, while we consider this important policy of promoting
    settlement—as it is, of course, one of the most efficient
    ways to resolve a controversy without court intervention—
    we must balance the fourth Burger King factor against the
    other factors.
    Finally, regarding the fifth factor, Zipit has not argued
    that there is “any conflict between the interests of Califor-
    nia and any other state.” Trimble, 997 F.3d at 1159 (quot-
    ing Xilinx, 848 F.3d at 1356); see also Judgment Op.,
    
    2021 WL 533754
    , at *4 (“Neither Apple nor Zipit have as-
    serted any potential clash of substantive social policies be-
    tween competing fora.” (cleaned up)). Indeed, “the same
    body of federal patent law would govern the patent [nonin-
    fringement] claim irrespective of the forum.” Elecs. for Im-
    aging, 
    340 F.3d at 1352
    . Rather, it argues that the
    settlement-promoting policy underlies this factor as well
    because “social interests of society are advanced when dis-
    putes are settled out of court.” Appellee’s Br. 27–28. As-
    suming (without deciding) that Zipit is correct, our
    Case: 21-1760    Document: 42      Page: 20      Filed: 04/18/2022
    20                           APPLE INC.   v. ZIPIT WIRELESS, INC.
    conclusion as to the fourth Burger King factor would apply
    with equal force to the fifth.
    Having considered each of these factors, we conclude
    that Zipit has not made a “compelling case that the pres-
    ence of some other considerations would render jurisdiction
    unreasonable.” Burger King, 
    471 U.S. at 477
    . As we
    acknowledged above, there is of course some burden on
    Zipit to litigate in California. But California and Apple
    both have an interest in litigating this patent dispute in
    California. And while we agree with Zipit that the settle-
    ment-promoting policy is a relevant factor to consider in
    assessing the reasonableness of jurisdiction, for the rea-
    sons above, we cannot say on the facts of this case that Cal-
    ifornia’s and Apple’s interest in litigating in California
    “pale[] in comparison to the interest of the judicial system
    and society at large.” Appellee’s Br. 34. Nor can we say
    that this policy, combined with Zipit’s burden, would ren-
    der the exercise of jurisdiction over Zipit compellingly and
    constitutionally unreasonable given the nature and extent
    of Zipit’s contacts. Zipit went beyond attempting to resolve
    its dispute with Apple outside of court; it amplified its alle-
    gations of infringement after Apple stated it did not need a
    patent license, and Zipit, in the end, sued Apple for patent
    infringement.
    Ultimately, this is not “one of the ‘rare’ situations in
    which sufficient minimum contacts exists but where the ex-
    ercise of jurisdiction would be unreasonable.” Elecs. for Im-
    aging, 
    340 F.3d at 1352
     (quoting Beverly Hills Fan Co.
    v. Royal Sovereign Corp., 
    21 F.3d 1558
    , 1568 (Fed. Cir.
    1994)). Zipit has not met its burden to present a compelling
    case that these factors in the aggregate would render the
    exercise of jurisdiction unreasonable.
    CONCLUSION
    We have considered the parties’ remaining arguments
    and find them unpersuasive. For the foregoing reasons, we
    reverse the district court’s judgment dismissing Apple’s
    Case: 21-1760      Document: 42         Page: 21   Filed: 04/18/2022
    APPLE INC.   v. ZIPIT WIRELESS, INC.                          21
    complaint for declaratory judgment of noninfringement for
    lack of personal jurisdiction and remand for further pro-
    ceedings.
    REVERSED AND REMANDED