Fundamental Innovation Systems International LLC v. ZTE Corporation et al.

I'll research this case across multiple sources to build a verified overview. Let me start with parallel searches.

Let me dig into the case outcome, the '586 patent specifically, and the PTAB proceedings.

Case Overview and Background

Parties. Plaintiff Fundamental Innovation Systems International LLC ("FISI") is a patent-assertion entity formed in Delaware in 2015 and backed by the private-equity firm Centerbridge Partners. FISI does not make or sell products; it acquired its portfolio — reported at roughly 200 power-charging patents and related foreign counterparts — from BlackBerry Limited (formerly Research In Motion) in a November 2015 transaction that RPX/IAM reporting ties to Centerbridge and a multi-million-dollar assignment involving over 55 U.S. assets (RPX Insight, Mar. 5, 2021; IAM, Mar. 8, 2021). FISI describes itself as "responsible for protecting and licensing seminal BlackBerry innovations in the field of USB charging," and by 2021 it claimed roughly 60 licensees across Apple, Samsung, LG, Huawei, Lenovo, TCL, BLU, Coolpad, Belkin/Hon Hai and others. Its monetization was run successively by TnT IP LLC (Craig Thompson, Ozer Teitelbaum) and then by IPVALUE alumni Kapu Kumar, Paul Seaman and Paul Riley under the JASPAR banner; John Desmarais — who later appeared pro hac vice for FISI in this very case (Dkt. 220, Nov. 2019) — is reported to have introduced Centerbridge to that team. Defendants are ZTE Corporation (Shenzhen, China), ZTE (USA), Inc. (a New Jersey corporation selling consumer electronics in the U.S.), and ZTE (TX), Inc. (a Texas corporation) — i.e., the operating-company parent plus its U.S. distribution and Texas affiliates. FISI's pre-suit notice went to ZTE USA's chief legal representative by letter dated December 11, 2015 (per the complaint), which is the date FISI pleads for actual knowledge and willfulness.

Accused technology and patents. FISI's theory is that ZTE's USB-charging ecosystem — mobile phones, tablets, and the wall/car charging adapters bundled with them — practices BlackBerry's early-2000s USB charging inventions. Named accused products in the complaint included the Axon, Axon 7, Axon 7 mini, ZMax, ZMax 2, Trek 2 HD, Nubia Z9 and Maven handsets and adapters bearing model numbers STC-A5915A-Z, STC-A5930A-Z, STC-A521A-Z and STC-A515S-Z. The case metadata identifies U.S. Patent No. 7,834,586 as the patent at issue — "Multifunctional Charger System and Method," issued November 16, 2010 from a February 26, 2010 application, a continuation of U.S. Patent No. 7,239,111 with earliest priority of March 1, 2001 (Fischer et al.). Claim 1 is directed to a mobile device for a wireless network comprising a USB interface, a charging subsystem connected to the V-bus line and to a battery, and — the disputed core — a device "configured to detect an identification signal at a D+ and a D− data line of the USB interface, the identification signal being different than USB enumeration," i.e., a signal that tells the phone it is connected to a non-host charger and may therefore draw current above USB limits (claim 8 is the method counterpart). Note, however, that the metadata understates the docket: the complaint (Exhibits A–D) asserted the '586, '111, '766 and '550 patents, and the amended complaint added the '655 patent (Veselic), so this was a five-patent case in which the '586 was one member of the "Fischer" family sharing a single specification (Dkt. 195, ZTE's SJ opposition; E.D. Tex. claim construction order, 2:16-cv-01425 Dkt. 146).

Procedural posture and venue. FISI filed on February 13, 2017 in the Eastern District of Texas (Marshall Division, Judge Rodney Gilstrap), No. 2:17-cv-00124; the case was transferred to the Northern District of Texas, Dallas Division, on July 12, 2017 and docketed as 3:17-cv-01827-N before Judge David C. Godbey. The transfer took the case out of the nation's busiest plaintiff-friendly patent venue into a Dallas docket; ZTE (USA) had filed a motion to dismiss for improper venue in E.D. Tex. in April 2017, which transfer mooted, and the court separately addressed service on the Chinese parent (the opinion at Fundamental Innovation Sys. Int'l, LLC v. ZTE Corp., No. 3:17-cv-01827-N, 2018 WL 3330022 (N.D. Tex. Mar. 16, 2018) held that ZTE USA was not ZTE Corporation's alter ego and that indirect service was improper). Claim construction was resolved December 21, 2018 by adopting Magistrate Judge Payne's constructions from FISI v. Samsung, No. 2:17-cv-145-JRG-RSP (E.D. Tex. Jan. 31, 2018). The case then went through expert discovery and a cluster of Daubert/motions-to-strike (both denied, Dkt. 223, Nov. 14, 2019) and a FISI partial summary-judgment motion on validity (Dkt. 181, Aug. 29, 2019), which Judge Godbey denied on November 20, 2019 (Dkt. 226, 2019 WL 6208278). The court held that IPR estoppel under § 315(e)(2) did not bar ZTE's '550 invalidity defense — following Shaw Industries v. Automated Creel Systems — where ZTE had raised the ground in a second petition the PTAB denied institution on, and that genuine fact disputes precluded summary judgment on the '111 and '766 obviousness theories (Theobald + Shiga). Four days later, on November 23, 2019, the parties filed a joint motion to stay and notice of settlement (Dkt. 227), and on January 3, 2020 the court dismissed FISI's claims with prejudice and ZTE's counterclaims without prejudice, retaining jurisdiction to enforce the settlement (Dkt. 229). So the litigation ended in a confidential settlement before trial; no verdict, judgment, or appeal on the merits exists for this case.

Why it matters. Three things make it notable. First, it is a case study in PTAB/district-court interplay: ZTE filed IPRs on the Fischer patents (IPR2018-00111 on the '550, instituted, final written decision May 3, 2019 upholding the claims; a second '550 petition and petitions on the '111 and '766 denied institution; the '586 was targeted in IPR2018-00276/-00487/-00495 by others), and Judge Godbey's ruling is a post-SAS application of Shaw to the two-petition scenario — a point later central to the Federal Circuit's en banc-type reconsideration of § 315(e)(2) in Unified Patents v. Qualcomm (2024). Second, the '586 patent's vulnerability ultimately materialized in a different forum: in IPR2021-00599 (TCT Mobile (US), Inc. v. FISI), the Board issued a final written decision holding claims 1–2 and 8–9 of the '586 unpatentable over Morita in view of USB "SE1" signaling (Banner & Witcoff PDF, 2022), and the '586 also faced an ex parte reexamination (90/015,020) on claims 1 and 8 — meaning the patent anchoring this case's metadata was invalidated in the TCL proceeding. Third, the case is a data point on NPE campaign economics: FISI's BlackBerry portfolio generated settlement-driven licensing across a dozen-plus defendants (Samsung settled in 2018; Huawei, LG and others became licensees), and FISI finally went to trial against Anker Innovations, reportedly winning a $14 million jury verdict in its first trial in March 2025 (IAM, Mar. 10, 2025) — several years after this ZTE case settled.

Sourcing caveats: Party roles, the accused products, the '586's prosecution details, the docket sequence and the Nov. 20, 2019 opinion are well documented (CourtListener/RECAP Dkt. 181, 195, 200, 223, 226, 227, 229; Justia). I could not independently confirm the precise date or subsequent appellate disposition of the IPR2021-00599 final written decision, the exact terms of the ZTE settlement, or the full count of FISI's BlackBerry acquisition — those rest on PTAB documents and IAM/RPX secondary reporting and should be treated as reported rather than verified. If you want, I can pull the live PACER docket and the PTAB proceeding pages to lock down those three items.

I'll research this case systematically using web searches.

Let me dig deeper into the docket, claim construction, and final disposition.

I have good detail on the early and middle stages. Let me now pin down the transfer, trial, and final disposition.

Fundamental Innovation Systems Int'l LLC v. ZTE Corp., No. 3:17-cv-01827-N (N.D. Tex.) — Chronology of Key Developments

Threshold note on parties and patents. The case metadata identifies the '586 patent (U.S. Pat. No. 7,834,586, "Multifunctional Charger System and Method") as the patent at issue. The docket record, however, shows FISI ultimately pressed five patents against ZTE in this action: the four "Fischer" patents — U.S. Pat. Nos. 7,239,111 ('111), 7,834,586 ('586), 8,232,766 ('766), and 8,624,550 ('550) — plus U.S. Pat. No. 7,893,655 ('655, Veselic). (ZTE opposition brief, Dkt. 195). The '586 was pleaded as the Second Claim for Relief in the amended complaint and answered by ZTE (USA) on the merits. I flag this because it affects how the PTAB record should be read.

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I. Filing and Initial Pleadings (2017)

• 2017-02-13 — Original complaint. FISI filed suit in the E.D. Tex. (Marshall Division) as Fundamental Innovation Systems Int'l LLC v. ZTE Corp., No. 2:17-cv-00124-JRG (Judge J. Rodney Gilstrap). FISI alleged ZTE's mobile devices, tablets, and charging adapters infringed FISI's USB-charging patents. FISI's patents descend from Research In Motion/BlackBerry R&D; FISI is a licensing entity (managed by JASPAR). (FISI SJ motion, Dkt. 181; PTAB mandatory notice)
• 2017-05-12 — Amended complaint served on ZTE Corporation, ZTE (USA), Inc., and ZTE (TX), Inc., adding, inter alia, the '655 patent (Veselic) and the '586. (Mintz/ZTE RPI briefing)
• Answer / counterclaims. ZTE (USA), Inc. filed an Answer to the Amended Complaint (served as an exhibit in the '550 IPR), responding claim-by-claim and denying infringement, including of the '586. (ZTE (USA) Answer)
• Notice/timing. FISI alleged ZTE had actual notice of infringement since 2015-12-11 (letter to ZTE USA's chief legal representative), supporting willfulness/induced-infringement theories and a request for treble damages and fees. (PTAB petition excerpt)

II. Venue, Transfer, and Early Dispositive Motion

• Transferred to N.D. Tex. The action was moved to the Northern District of Texas (Dallas) and re-docketed as 3:17-cv-01827-N before Judge David C. Godbey; the case was "originally filed … in the Eastern District of Texas, and later transferred to the Northern District of Texas." The transfer was complete by mid-2017 (the first N.D. Tex. filings date to August 2017). I could not confirm the exact transfer mechanism or transfer-order date from the sources retrieved — treat that detail as unverified. (PTAB mandatory notice; Mintz briefing)
• 2017-08-18 — ZTE Corporation's Rule 12(b)(5) motion to dismiss for improper service (Dkt. 53). ZTE argued FISI never properly served the Chinese parent; serving U.S. subsidiary ZTE (USA) was ineffective because ZTE USA is not ZTE Corporation's alter ego and was not authorized to accept service. (Dkt. 53 & Wood declaration)
• 2018-03-16 — Motion GRANTED; ZTE Corporation dismissed (Dkt. 91; Fundamental Innovation Sys. Int'l, LLC v. ZTE Corp., No. 3:17-CV-01827-N, 2018 WL 3330022 (N.D. Tex. Mar. 16, 2018)). Under Schlunk and Fifth Circuit alter-ego law, the court held FISI had not shown the pervasive control required, and the indirect service was improper. The order recited that ZTE Corporation was "DISMISSED with PREJUDICE." (Dkt. 91; order text; Dkt. 53-5 order) — Caveat: despite that dismissal, ZTE Corporation continued to appear in the caption and in later filings, suggesting FISI may later have effected (Hague) service or that the entity was otherwise restored. I could not confirm this from the record retrieved; flag as uncertain.

III. Claim Construction (Markman)

• 2018-12-21 — Claim construction order. Rather than conducting an independent Markman hearing, Judge Godbey adopted the constructions of Magistrate Judge Roy S. Payne from the parallel E.D. Tex. case Fundamental Innovation Systems Int'l LLC v. Samsung Electronics Co., No. 2:17-cv-00145-JRG-RSP (E.D. Tex. Jan. 31, 2018, ECF 140). The N.D. Tex. order is dated December 21, 2018. This coordinated-construction approach tied the ZTE case to the constructions used in FISI's parallel Samsung litigation. (ZTE Claim Construction Order, N.D. Tex. 3:17-cv-01827, reproduced as Ex. 2012 in IPR2021-00599)

IV. Discovery Milestones of Strategic Significance

• 2017-10-23 — ZTE served invalidity contentions, identifying Shiga ('738), Rogers ('564), Theobald ('942), and Dougherty ('004) — positions later central to both the IPRs and the § 315(e)(2) estoppel fight. (Dkt. 181)
• June 2019 — ZTE served its invalidity expert report (Dr. Matthew Shoemake), pressing obviousness combinations (e.g., Theobald + Shiga for the '111/'766; Dougherty-based grounds for the '550). (Dkt. 181)
• 2019-05 — Discovery dispute flare-up. FISI filed a sealed motion to compel discovery (Dkt. 147, entered ~05/09/2019); ZTE responded (Dkt. 155/157, 05/10/2019); the parties notified the court of resolution (05/20/2019); and the motion was withdrawn by sealed order on 2019-06-06. (Unified Patents docket)
• Bundled-adapter discovery/product-scope issue. The parties entered a Joint Stipulation Regarding Bundled Charging Adapters, aimed at narrowing the universe of accused adapters and curbing double-counting in damages. (Unified Patents docket)
• 2019-10-21 — ZTE filed a Notice of Withdrawal of Certain Defenses, i.e., it jettisoned some invalidity/non-infringement defenses before trial — a common move to focus the case. (Unified Patents docket)
• 2019-11-08 — FISI pro hac vice admissions (notably John M. Desmarais and Joze Faye Welsh), signaling FISI's trial-team build-up. (CourtListener docket feed)

V. Pre-Trial Motions of Substance (2019)

• Daubert / motions to strike (both denied). ZTE moved to strike FISI's damages expert (Mr. Weinstein); FISI moved to strike ZTE's non-infringement/invalidity expert reports (Dr. Shoemake). On 2019-11-14, Judge Godbey denied both (Dkt. 223), holding the disputes went to weight/methodology application, not admissibility — a jury question. (CourtListener entry #223; Studicata summary)
• FISI's motion for partial summary judgment of no invalidity ('550, '111, '766) — DENIED on 2019-11-20 (Dkt. 226). Judge Godbey held:
  • (a) No § 315(e)(2) estoppel as to the '550. Because ZTE raised its Dougherty grounds in a second '550 petition (IPR2018-00110) that was denied institution, and because Shaw Industries estops only grounds that were instituted, FISI was not entitled to judgment of no invalidity. The court declined to extend estoppel despite SAS's elimination of partial institution, noting the statutory aim (preventing strategic splitting) was not frustrated where all grounds were filed in same-day petitions. (Dkt. 226 memo opinion; 2019 WL / Justia PDF)
  • (b) Genuine fact dispute on obviousness of the '111/'766 based on Theobald + Shiga, given conflicting expert testimony. (Dkt. 226)
• ZTE's motion for summary judgment of non-infringement (Dkt. 184, filed ~September 2019) and FISI's related briefing/appendix (Dkt. 195 opposition; Dkt. 200 reply) were fully briefed. The disposition of ZTE's non-infringement SJ motion is not confirmed by the sources retrieved.

VI. Parallel PTAB Proceedings (and Their Effect)

ZTE (often with Samsung as co-petitioner in FISI's parallel Samsung case) filed a coordinated wave of IPRs against the Fischer patents:

Sources: FISI SJ motion Dkt. 181; '111 mandatory notice (identifying three denied '586 IPRs); IPR2018-00274 (GreyB/IPVerse: institution denied 2018-08-29); IPR2018-00485 (Plainsite); '766 mandatory notice; ZTE RPI dispute (Mintz briefing).

Effect on the litigation:

• The '586 was the one asserted patent for which every IPR petition failed at the institution stage — so the PTAB never reached the merits of the '586, leaving its validity to the district court.
• The only instituted Fischer IPR ('550) went to a final written decision affirming patentability (2019-05-03), but because ZTE's alternative Dougherty-based '550 grounds came in through a denied petition, the court allowed those grounds to proceed at trial — defeating FISI's estoppel play (Dkt. 226).
• No stay pending IPR was granted in this case (none appears in the record retrieved); the parties litigated validity in parallel with the IPRs.

VII. Trial Posture, Verdict, and Final Disposition

• 2019-11-01 — Joint Pretrial Disclosures and Joint Proposed Pretrial Order filed (Dkt. 218), including the joint stipulation on bundled charging adapters, competing witness lists, deposition designations, and exhibit lists — i.e., the case was trial-ready heading into late 2019. (CourtListener entry #218)
• Verdict / judgment / post-trial motions / appeal: NOT CONFIRMED. The sources retrieved do not establish a jury verdict, bench ruling, JMOL/new-trial motion, fee award, or appeal. The metadata's status — "summary judgment briefing; later outcome not confirmed" — is consistent with what I can verify: the last firm docket landmarks I can document are the Nov. 14, 2019 expert-strike denial, the Nov. 20, 2019 summary-judgment denial, and the Nov. 1, 2019 pretrial filings.
• Settlement/license: plausible but unverified. FISI ran a portfolio-licensing campaign and simultaneously litigated the same patents against Samsung (2:17-cv-00145-JRG), Huawei, and others, which raises the likelihood of a global resolution or dismissal, but I cannot confirm any ZTE settlement, dismissal, or final judgment from the sources available. Treat the final disposition as open.
• Downstream PTAB activity confirms the patents stayed in dispute: in IPR2021-00599, TCT Mobile (US) Inc. v. FISI (filed 2021), FISI relied on this very case's ZTE claim-construction order as an exhibit — showing the FISI portfolio (and the constructions from this litigation) retained relevance in later challenges well after 2019. (Ex. 2012 in IPR2021-00599)

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Bottom Line

1. Filing/pleadings: Filed 2017-02-13 in E.D. Tex. (2:17-cv-00124-JRG), amended 2017-05-12, then transferred to N.D. Tex. (3:17-cv-01827-N, Judge Godbey); ZTE answered on the merits, including as to the '586.
2. Early dismissal: ZTE Corporation obtained a 2018-03-16 Rule 12(b)(5) dismissal for improper service (2018 WL 3330022), though its later appearance in the caption clouds this.
3. Markman: Court adopted the E.D. Tex. Samsung constructions (2018-12-21) rather than construing terms independently.
4. PTAB: A coordinated IPR wave; only the '550 petition was instituted (FWD 2019-05-03 upholding patentability); all three '586 petitions and the '111, '766, and (one) '655 petitions were denied institution. No litigation stay.
5. Case dispositive motions (2019): Both motions to strike denied (2019-11-14); FISI's no-invalidity summary judgment denied (2019-11-20) on § 315(e)(2) estoppel (Shaw) and obviousness-dispute grounds. ZTE's non-infringement SJ outcome unconfirmed.
6. Final disposition: unconfirmed. The case was trial-ready as of Nov. 2019; no verdict, judgment, post-trial ruling, or appeal could be verified, and any settlement/dismissal is unconfirmed.

Sourcing caveats: Dates and docket numbers above are drawn from court filings reproduced on CourtListener/Justia, the PTAB record, and secondary dockets (Unified Patents, Plainsite, GreyB). The transfer mechanism/date, the fate of the ZTE Corporation dismissal, the ZTE non-infringement SJ ruling, and the ultimate disposition are the specific points I could not corroborate and should be validated against PACER before being relied upon.

I'll search for press coverage of this case from multiple angles.

Let me search specifically for press and trade coverage.

Let me search more specific press angles, including Law360 headlines and any coverage of the settlement.

Press and analyst coverage of FISI v. ZTE

A targeted search on the case caption, the party names, and the asserted patent numbers (including the '586, '111, '766, '550 and '655 patents) returned almost entirely primary-source material — CourtListener/RECAP docket entries, Justia and Docket Alarm case pages, Unified Patents and Patexia litigation mirrors, and PTAB filings — rather than news or analysis. I found no dedicated article on this litigation from Reuters, Bloomberg Law, Law360, Ars Technica, The Verge, IPWatchdog, Patently-O, EFF Deeplinks, JD Supra, or any mainstream outlet. There is likewise no press report of the November 2019 settlement/stay or the January 2020 dismissal with prejudice, no reported damages figure or settlement term for the ZTE case, and no executive or industry reaction to it. In other words, this appears to have been a quiet, low-profile NPE campaign suit that resolved before trial and never generated standalone press coverage.

The only coverage I could locate that discusses the case directly — and even then only in passing — is trade-press from the patent-monetization sector. RPX Insight (formerly RPX Empower), in a March 5, 2021 roundup of "well-heeled NPEs," listed ZTE among roughly twenty defendants that FISI had sued since late 2016 and reported the campaign background that frames this suit: that FISI was backed by the private-equity firm Centerbridge Partners, was formed in Delaware in 2015, acquired its patents from BlackBerry in a November 2015 transaction involving over 55 U.S. assets plus foreign counterparts, and moved its monetization from the TnT IP team to former IPVALUE executives operating under the JASPAR banner. RPX framed the ZTE action purely as one line item in a broader USB-charging campaign rather than analyzing its merits or outcome. An earlier RPX Empower piece (Feb. 9, 2019), reporting Apple's declaratory-judgment action against FISI, similarly referenced the campaign as "hitting Huawei, LG Electronics (LGE), Samsung, and ZTE" — again mentioning ZTE only as a campaign target, with no detail on the N.D. Tex. case itself. A comparable RPX Empower item (Mar. 25, 2018) covered the German leg of the campaign against Samsung and retailers but did not address ZTE. Separately, National Law Review's routine "PTO Litigation Report" (Feb. 13, 2018) carried the filing of the ZTE/Samsung IPR2018-00276 petition on the '111 patent as a database-style listing, not as reported analysis.

Beyond those, the closest items are IAM articles on the FISI portfolio that surfaced in search but whose available text does not discuss this case: IAM's July 19, 2018 report that management of the former BlackBerry patents changed hands amid the Samsung settlement, and IAM's November 8, 2019 report that FISI signed an RPX agreement (giving RPX members coverage on the USB-charging patents) while Apple also settled. Both concern FISI's licensing program generally; neither reports on ZTE. One caveat for the record: Law360 maintains a paywalled PTAB case-tracking page for ZTE (USA) Inc. v. Fundamental Innovation Systems International LLC (Law360), but it is a docket-style database entry showing "Institution Denied," not a news article, and I could not access any Law360 prose coverage.

Bottom line for this section: the press record on FISI v. ZTE is essentially confined to campaign roundups in RPX (and, tangentially, IAM) that name ZTE as a defendant but do not report the case's filings, rulings, or disposition. Any substantive account of this action has to be built from the court and PTAB records described in the earlier sections, not from journalism.

Sourcing note: the RPX dates and campaign details above come from the linked RPX/RPX Empower pages; the IAM items are cited only for their headlines and teaser text, which do not address ZTE. I did not find — and am not asserting — any outlet that reported a dollar figure, settlement term, or verdict specific to this case.

Sources

• IN THE UNITED STATES DISTRICT COURT FOR THE EASTERN DISTRICT OF TEXAS MARSHALL DIVISION
• UNITED STATES PATENT AND TRADEMARK OFFICE
• IN THE UNITED STATES DISTRICT COURT FOR THE NORTHERN DISTRICT OF TEXAS DALLAS DIVISION
• IN THE UNITED STATES DISTRICT COURT NORTHERN DISTRICT OF TEXAS DALLAS DIVISION
• ZTE (USA) Inc. v. Fundamental Innovation Systems International LLC
• Fundamental Innovation Systems International LLC v. ZTE Corporation, 3:17-cv-01827 - CourtListener.com - Fundamental Innovation Systems International LLC v. ZTE Corporation (3:17-cv-01827)
• Docket Alarm | Litigation Outcomes, Delivered
• From: Sent: To: Cc:
• #226 in Fundamental Innovation Systems International LLC v. ZTE Corporation (N.D. Tex., 3:17-cv-01827) – CourtListener.com - 🚀 Limited-time offer
• Docket updates for Fundamental Innovation Systems International LLC v. ZTE Corporation, 3:17-cv-01827 - Docket updates for Fundamental Innovation Systems International LLC v
• IN THE UNITED STATES DISTRICT COURT FOR THE NORTHERN DISTRICT OF TEXAS DALLAS DIVISION
• Links 20/7/2018: MusicBrainz is Back, Microsoft Pushing .NET Through Canonical - To conclude, and as can clearly be seen from the length of this post, Varadarajan's article is a tremendously enlightening read ...

I'll research the counsel of record for the plaintiff in this case.

Let me dig deeper into the docket and the specific plaintiff's counsel.

Let me verify specific counsel details — including Jon B. Hyland's firm and the Desmarais connection.

Plaintiff-side counsel of record — FISI v. ZTE, No. 3:17-cv-01827-N (N.D. Tex.)

Bottom line: The plaintiff, Fundamental Innovation Systems International LLC ("FISI"/"Fundamental"), was represented by a three-firm coalition. Quinn Emanuel Urquhart & Sullivan LLP was the district-court lead from filing through the 2019 summary-judgment round; Irell & Manella LLP handled the parallel PTAB IPRs and made district-court appearances; Capshaw DeRieux LLP served as Texas local counsel in the original E.D. Tex. phase. A change of lead counsel occurred in May 2019 (Jon B. Hyland substituted in), and in fall 2019 John M. Desmarais and Joze Faye Welsh were admitted pro hac vice on the plaintiff's behalf — immediately before the case settled. No in-house counsel for FISI appears on the docket.

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Counsel of record for Plaintiff (as reflected in docket entries)

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How the representation changed over time

• Feb. 13, 2017 — filed in E.D. Tex. as FISI v. ZTE Corp., No. 2:17-cv-124 (Judge Gilstrap), asserting five patents including the '586. DeFranco was designated Attorney in Charge; Capshaw DeRieux acted as Texas local counsel.
• June 21, 2017 — Gilstrap ordered transfer to the Northern District of Texas (Docket: "ORDER — It is hereby ORDERED that the above-styled action is transferred to the Northern District of Texas"); docketed in Dallas as 3:17-cv-01827-N before Judge David C. Godbey (transfer noted 7/12/2017).
• 2018–2019 — FISI defended the patents in eight-plus ZTE IPRs via Irell & Manella (Zhong/Fleming/Sheasby), while Quinn Emanuel ran the district case (DeFranco/Johnson/Biddinger et al.).
• May 13, 2019 — Jon B. Hyland substituted in as lead counsel (unopposed motion), and his name appears as the ECF filer on essentially every plaintiff filing thereafter, including the Dkt. 180/181 partial-MSJ motion of no invalidity.
• Sept.–Nov. 2019 — PHV admissions of Gyushik Jang, John M. Desmarais, and Joze Faye Welsh — a Desmarais LLP trial team — on the plaintiff's behalf.
• Nov. 20, 2019 — the court denied FISI's partial summary judgment of no invalidity (Mem. Op. & Order, Dkt. 226/225).
• Nov. 25, 2019 — joint motion to stay on notice of settlement granted; Jan. 3, 2020 — joint motion to dismiss granted: FISI's claims dismissed with prejudice, ZTE's counterclaims dismissed without prejudice, the court retaining jurisdiction only to enforce the settlement agreement.

Parallel PTAB representation (same plaintiff, separate forum)

For the associated IPRs (e.g., IPR2018-00276 ('111), IPR2018-01076 ('655), IPR2018-00111 ('550)), the Patent Owner's mandatory notices name H. Annita Zhong as lead counsel and Michael R. Fleming and Jason Sheasby as backup — all of Irell & Manella LLP, 1800 Avenue of the Stars, Los Angeles, with service email FundamentalIPRs@irell.com. These filings expressly cross-reference 3:17-cv-01827-N.

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Caveats and things I could not confirm

1. Jon B. Hyland's firm is not confirmed. The docket snippets show him substituting in as lead counsel and filing the plaintiff's 2019 papers, but no firm name was retrievable from my searches. The pro hac vice applications he filed were for Desmarais LLP attorneys (John M. Desmarais, Joze Faye Welsh), and the Sept.–Nov. 2019 PHV admissions cluster in the same window — which is consistent with a Desmarais LLP-led trial team, but I could not verify his firm affiliation and am not asserting it.
2. Gyushik Jang's firm is likewise inferred (same PHV cluster, application filed by Hyland on FISI's behalf) rather than confirmed.
3. No separate Dallas local counsel for the N.D. Tex. phase appears in the entries I retrieved; the local-rule anchor appears to have been the designated attorneys in charge (DeFranco, then Hyland), with the Capshaw DeRieux Texas-local role tied to the E.D. Tex. phase. I did not retrieve a Capshaw DeRieux withdrawal order in N.D. Tex.
4. Keana Theresa Taylor should not be listed for the plaintiff. At least one aggregator (Justia, for E.D. Tex. 2:17-cv-124) lists her under "Represented By" for the plaintiff; the underlying docket shows her filing ZTE's extension-of-time applications and an unopposed withdrawal on behalf of ZTE (TX)/ZTE (USA), so she was defense-side.
5. Sealed material. Several 2019 filings (Dkts. 173, 184, 191, 207, 209, 213, 216) are sealed, and motions in limine were filed under seal; I could not inspect their signature blocks. The sealed designations do not affect the counsel-of-record picture above, but individual attorney responsibility on sealed papers can't be verified.
6. Current/post-2020 status is moot — the action was dismissed with prejudice on Jan. 3, 2020, so there is no live appearance list to update.

Primary sources: CourtListener docket #6332255 (N.D. Tex. 3:17-cv-01827) and the transferred E.D. Tex. docket entries it carries; the Oct. 3, 2019 reply brief signature block (storage.courtlistener.com/recap/gov.uscourts.txnd.290306/gov.uscourts.txnd.290306.200.0.pdf); the Unified Patents litigation portal entry for 3:17-cv-01827; and the USPTO PTAB mandatory notices for IPR2018-00276 and IPR2018-01076.

I'll research the docket and counsel appearances for this case.

Let me dig into the docket entries and attorney identities.

Bottom line

The ZTE defendants were represented by a McDermott Will & Emery LLP team out of Chicago (national/lead) with Dallas and Texas local counsel. The case did not go to trial: after FISI's partial-SJ motion was denied on 11/20/2019, the parties settled, the case was stayed (11/25/2019), and all claims were dismissed with prejudice on 1/3/2020. So this counsel roster is effectively final, and it is also the same firm that ran ZTE's parallel IPRs against FISI.

⚠️ Sourcing caveat: PACER is paywalled and I could not open the raw docket sheet. The roster below is reconstructed from RECAP/CourtListener docket entries, the Unified Patents N.D. Tex. docket mirror, and PTAB filings (which list ZTE's counsel signature blocks) — cited individually. I flag unverified items explicitly.

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Counsel of record for ZTE Corporation, ZTE (USA), Inc., and ZTE (TX), Inc.

Docket support: Fundamental Innovation Sys. Int'l, LLC v. ZTE Corp., No. 3:17-cv-01827-N (N.D. Tex.) — Dkt. 53 (ZTE Corp. Rule 12(b)(5) motion, filed by C. Turner, 8/18/2017); Dkt. 53-1 (Bennett declaration); notices of appearance by N. Bennett (4/24/2017) and S. Barnes (10/21/2019); PHV admissions of Jones/DaMario (2017–18); CourtListener docket: https://www.courtlistener.com/docket/6332255/fundamental-innovation-systems-international-llc-v-zte-corporation/ ; Unified Patents mirror: https://portal.unifiedpatents.com/litigation/Texas%20Northern%20District%20Court/case/3:17-cv-01827 ; PTAB power of attorney (IPR2018-00276): https://www.docketalarm.com/cases/PTAB/IPR2018-00276/ (signature block listing McMahon/Jones/DaMario/Zhang at MWE).

Related counsel-perfecting detail: Because ZTE Corporation is a Chinese entity, the court had to resolve service. ZTE's counsel represented both ZTE Corporation and ZTE USA, and the court ultimately permitted alternative service on ZTE Corporation through its litigation counsel — Fundamental Innovation Sys. Int'l, LLC v. ZTE Corp., No. 3:17-CV-01827-N, 2018 WL 3330022 (N.D. Tex. Mar. 16, 2018) (Dkt. 91); see also ZTE Corp.'s reply, Dkt. 74 (9/29/2017).

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Items I could not confirm (flagging rather than guessing)

1. Desmarais LLP — John M. Desmarais, Joze Faye Welsh, and Gyushik Jang. PHV motions for these three were granted 9/26/2019 (Jang, Dkt. 198) and 11/14–11/18/2019 (Desmarais, Dkt. 220; Welsh, Dkt. 221). Which party they represented is genuinely ambiguous in the sources I could reach: the Unified Patents docket mirror attributes at least the Jang application to "filed by Fundamental Innovation Systems International LLC" (i.e., plaintiff), while the RECAP docket text lists these entries immediately after ZTE's local-counsel appearance. I could not open the underlying filings to resolve it. Do not treat these three as confirmed defense counsel. (Desmarais LLP is a well-known patent-litigation boutique, which is why the ambiguity matters.)
2. "Hersh H. Mehta" withdrawal. A "MOTION to Withdraw as Attorney Hersh H. …" appears on the docket index, but the index snippet does not identify the party. Mehta appeared alongside McMahon and Bennett for ZTE in Evolved Wireless, LLC v. ZTE Corp. (D. Del.), which suggests (but does not establish) he was part of the ZTE team here.
3. James Oehler. An attorney named Oehler is the ECF filer on ZTE's sealed motion to strike plaintiff's damages-expert opinions (per the docket mirror). His firm affiliation is unverified in my sources; I will not attribute him to a firm.

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Value-add: the case outcome the prior summary lists as "unconfirmed"

The docket resolves it. Judge Godbey denied FISI's motion for partial summary judgment of no invalidity (asserted against the '550, '111 and '766 patents) by Memorandum Opinion and Order entered 11/20/2019 (Dkt. 180 briefing; opinion at Dkt. 185/186 range); the parties then filed a Joint Motion to Stay and Notice of Settlement, the stay was granted 11/25/2019 (Dkt. 227), and on 1/3/2020 the court granted the Joint Motion to Dismiss (Dkt. 229) — FISI's claims dismissed with prejudice, ZTE's counterclaims dismissed without prejudice, each side bearing its own fees and costs, with the court retaining jurisdiction to enforce the settlement. Note also that while the case metadata lists only the '586 patent, ZTE's answer (Dkt. 46, 7/31/2017) identifies the '586 alongside the '111, '766, '550 and '655 patents as Patents-in-Suit, and the 2019 SJ briefing centered on the '550/'111/'766.