Longitude Licensing Limited et al. v. Lenovo Group Limited et al.

Longitude Licensing Limited and Marlin Semiconductor Limited, the plaintiffs in this patent infringement lawsuit, are both intellectual property management companies, commonly referred to as Non-Practicing Entities (NPEs) or Patent Assertion Entities (PAEs). Longitude, based in Dublin, Ireland, specializes in maximizing the value of patented intellectual property and manages portfolios totaling over 8,000 active patents and applications, including those related to semiconductor design and manufacturing. Marlin Semiconductor, also Irish-based and a subsidiary of Longitude, acquired a portfolio of logic, memory, manufacturing process, and packaging patents from United Microelectronics Corporation (UMC) in 2021. The defendants are major technology companies: Lenovo Group Limited, a Hong Kong-based multinational corporation specializing in consumer electronics, personal computers, software, and smartphones (including its Motorola Mobility brand); Motorola Mobile Communication Technology Ltd., a subsidiary of Lenovo focusing on Android-based smartphones and mobile devices; OnePlus Technology (Shenzhen) Co., LTD., a Chinese consumer electronics manufacturer known for its smartphones; and Taiwan Semiconductor Manufacturing Company Limited (TSMC), a Taiwanese multinational semiconductor contract manufacturing and design company and the world's largest independent foundry for semiconductor chips.

The asserted patent in this case is U.S. Patent 8,076,194. While specific details for patent 8,076,194 were not immediately available in the search results, it is part of a semiconductor patent portfolio asserted by Marlin Semiconductor, which acquired its patents, including those for "semiconductor structures, processes, and circuits," from United Microelectronics Corporation (UMC). Therefore, it can be inferred that patent '194 broadly relates to semiconductor fabrication technology. The accused products, services, or technology are generally described as non-x86 semiconductor devices, including semiconductor wafers or dies manufactured outside the United States using TSMC's 7nm and smaller process nodes, as well as products containing such semiconductor devices, such as personal computers, smartphones, and tablets, produced or sold by the defendants.

The case was filed in the U.S. District Court for the Eastern District of Texas, Marshall Division, under case number 2:25-cv-00171, and is presided over by District Judge Rodney Gilstrap. The Eastern District of Texas has historically been a popular venue for patent infringement lawsuits due to its reputation for plaintiff-friendly verdicts, expeditious trials (often referred to as a "rocket docket"), and local rules that can favor patent owners. Although the Supreme Court's TC Heartland decision in 2017 aimed to limit venue options by defining corporate residency more narrowly, plaintiffs continue to file in the Eastern District of Texas, often relying on the "regular and established place of business" prong of the venue statute. This case is notable due to the plaintiffs being NPEs asserting a semiconductor patent portfolio against major operating companies in the highly competitive semiconductor and consumer electronics industries. Furthermore, the litigation is explicitly a companion to an ongoing International Trade Commission (ITC) investigation (337-TA-3809), which involves the same parties and the same patent issues. The existence of parallel district court and ITC proceedings is a common strategy for NPEs to exert pressure on defendants by leveraging the ITC's faster adjudication timeline and the potential for exclusion orders against infringing imports. This dual approach highlights the plaintiffs' aggressive assertion pattern within the semiconductor market.

Key Legal Developments and Outcome

The patent infringement litigation Longitude Licensing Limited et al. v. Lenovo Group Limited et al. (2:25-cv-00171 E.D. Tex.) is currently ongoing. Key legal developments and the present posture are as follows:

1. Filing & Initial Pleadings:

• The complaint was filed by Longitude Licensing Limited and Marlin Semiconductor Limited in the U.S. District Court for the Eastern District of Texas under Judge Rodney Gilstrap. While the exact filing date of the complaint for this specific case (2:25-cv-00171) was not immediately available in the search results, related patent cases in the Eastern District of Texas were filed around the 2024-2025 timeframe. For instance, a separate case in the same court (2:25-cv-00899) was filed on August 27, 2025.
• Details regarding the defendants' answers or any counterclaims have not yet been publicly disclosed in the search results.

2. Pre-trial Motions of Substance:

• There is no public information available yet regarding specific pre-trial motions such as motions to dismiss, transfer, or stay pending inter partes review (IPR) for this particular case. Such motions are common in patent litigation.

3. Claim Construction (Markman):

• This case is a companion to an ongoing International Trade Commission (ITC) investigation, 337-TA-1443. The ITC investigation has a Markman hearing scheduled for September 18, 2025. This indicates that claim construction will be a critical step in both the ITC and the district court proceedings.

4. Discovery Milestones:

• No specific discovery milestones for the district court case have been publicly reported. However, in general, discovery begins immediately upon institution of an ITC investigation and requires more detailed allegations than district court complaints. Parties in litigation are expected to exchange documents and resolve discovery disputes prior to pre-trial conferences.

5. Trial Events, Verdict, and Post-Trial Motions:

• As the case is ongoing, it has not yet reached trial. The ITC investigation (337-TA-1443) has a hearing scheduled from February 2, 2026, to February 6, 2026. A final determination in an ITC investigation is made at the earliest practicable time.

6. Settlement, Dismissal, Judgment, or Appeal:

• The case is currently active and has not reached a final disposition such as settlement, dismissal, or judgment.

7. Parallel PTAB IPR/PGR Proceedings:

• The asserted patent is U.S. Patent 8,076,194. A search for IPRs related to this patent in the USPTO's Patent Trial and Appeal Case Tracking System (P-TACTS) did not return any explicit results for IPRs filed against U.S. Patent 8,076,194. However, it is common for defendants in patent infringement suits to file IPR petitions.
• The companion ITC investigation, "Certain Foreign-Fabricated Semiconductor Devices, Products Containing the Same, and Components Thereof; Inv. No. 337-TA-1443," was instituted on March 19, 2025, and is pending before the Administrative Law Judge (ALJ). The notice of institution for this ITC investigation was published on March 26, 2025. The initial determination for an ITC investigation is subject to review by the Commission, and a final determination is made at the earliest practicable time. The ITC is known for its faster adjudication timeline, and its potential for exclusion orders against infringing imports often puts pressure on defendants in parallel district court proceedings.

Longitude Licensing Limited and Marlin Semiconductor Limited are represented by counsel from several firms in this case, 2:25-cv-00171, in the Eastern District of Texas. While a full list of appearing counsel requires direct PACER access, information from related filings and news articles identifies key attorneys and firms.

Counsel for Longitude Licensing Limited and Marlin Semiconductor Limited:

• Robins Kaplan LLP

  • This firm frequently represents Longitude Licensing and Marlin Semiconductor in patent litigation. They secured a $67 million jury verdict for Longitude Licensing in an LCD patent infringement case against BOE Technology Group Co. in January 2026 in the Eastern District of Texas, involving patents related to semiconductor devices and methods for configuring pixel electrode orientations.
  • Attorneys noted in the BOE case who are likely involved in Longitude's broader litigation efforts include:
    • Aaron Fahrenkrog (Lead Counsel) - Partner, Robins Kaplan LLP (Minneapolis office). Experienced in patent litigation, particularly in the Eastern District of Texas.
    • Emily Tremblay (Counsel) - Partner, Robins Kaplan LLP. Involved in the successful BOE jury verdict.
    • Benjamen Linden (Counsel) - Partner, Robins Kaplan LLP. Part of the trial team that secured the BOE verdict.
    • Samuel LaRoque (Counsel) - Associate, Robins Kaplan LLP. Also contributed to the BOE trial victory.
    • William Jones (Counsel) - Associate, Robins Kaplan LLP. Member of the trial team in the BOE case.
    • Diana Kawka (Counsel) - Associate, Robins Kaplan LLP. Assisted in securing the BOE verdict.
  • Garrett C. Parish - Robins Kaplan LLP (Minneapolis office). Appeared on behalf of Longitude Licensing Limited in a related case (2:25-cv-00440) in the Eastern District of Texas.

• Miller Fair Henry PLLC

  • This firm frequently serves as local counsel in the Eastern District of Texas.
  • Attorneys from Miller Fair Henry PLLC have appeared for Longitude Licensing Limited in other related Eastern District of Texas cases.

• Michael T. Renaud - From the Verified Complaint under Section 337 in the parallel ITC investigation (337-TA-1443), Michael T. Renaud is listed as counsel for Complainants Longitude Licensing Ltd. and Marlin Semiconductor Limited.

• Adam S. Perdue - Also listed as counsel for Complainants in the ITC investigation alongside Michael T. Renaud.

It is common for non-practicing entities (NPEs) like Longitude Licensing to use a combination of national patent litigation firms as lead counsel and local counsel in venues like the Eastern District of Texas. While the specifics of roles (e.g., lead vs. backup) within this particular case (2:25-cv-00171) are best confirmed via the docket, the listed attorneys and firms have a strong, documented history of representing Longitude Licensing and Marlin Semiconductor in related patent infringement matters.

The identity of counsel for defendants in Longitude Licensing Limited et al. v. Lenovo Group Limited et al. (2:25-cv-00171 E.D. Tex.) requires direct PACER access for definitive confirmation, as publicly available search results primarily highlight counsel in other, related cases involving these defendants or general information about their in-house IP teams. However, based on typical patent litigation practices in the Eastern District of Texas and publicly available information from other cases, we can infer likely representation and identify key in-house counsel.

In-House Counsel (General)

Taiwan Semiconductor Manufacturing Company Limited (TSMC)

• Sylvia Fang
  • Role: Senior Vice President, Legal and General Counsel / Corporate Governance Officer.
  • Firm: TSMC (Hsinchu, Taiwan).
  • Note: Joined TSMC in 1995, has worked on numerous high-profile corporate transactions and precedent-setting intellectual property trade secret litigations, and has been recognized by the global legal community.
• Billie Chen
  • Role: Associate General Counsel and Chief IP Counsel.
  • Firm: TSMC (Hsinchu, Taiwan).
  • Note: Responsible for all patent IP-related functions, including global patent strategy, portfolio establishment, and directing offensive and defensive strategies for patent disputes and litigation.
• Michael Shen
  • Role: Director, Chief Counsel - Patent Litigation.
  • Firm: TSMC (Hsinchu, Taiwan).
  • Note: Specializes in patent litigation and has been with TSMC since March 2014; previously an IP Litigation Partner at Haynes and Boone, LLP and Kenyon & Kenyon LLP.

Lenovo Group Limited / Motorola Mobile Communication Technology Ltd.

• John Mulgrew
  • Role: Deputy General Counsel and Chief Intellectual Property Officer.
  • Firm: Lenovo (office location not specified, but has worked extensively in US IP).
  • Note: Joined Lenovo in December 2019; previously led the IP team at Uber Technologies Inc. and Microsoft's patent analysis team, where he oversaw outbound patent licensing and initiated Microsoft's acquisition of AOL's patent portfolio.

External Counsel (Likely based on related cases and common practices)

While specific external counsel for this exact case are not explicitly named in public searches without direct PACER access, the following firms and attorneys have a history of representing Lenovo, Motorola, or OnePlus in patent litigation in the Eastern District of Texas or similar venues. It is highly probable that some of these or similar firms are representing the defendants in 2:25-cv-00171.

For Lenovo / Motorola:

• Vinson & Elkins LLP
  • Steven David Moore (Houston, TX) - Previously represented Lenovo in patent litigation.
  • Note: Vinson & Elkins has a strong intellectual property practice.
• Willkie Farr and Gallagher LLP
  • Aliza George Carrano (New York, NY) and Dane Sowers - Also represented Lenovo in past patent disputes.
• Kilpatrick Townsend Stockton LLP
  • Andrew Evans - Represented Lenovo in patent litigation.
• Jones Day
  • John A. Marlott (Chicago, IL) and Kristina N. Hendricks (Chicago, IL) - Represented Motorola Solutions, Inc. in patent infringement claims in the Eastern District of Texas.
  • Note: Jones Day has a significant IP practice and experience with Motorola entities.
• Winston & Strawn LLP
  • Jonathan E. Retsky (Chicago, IL), Andrew R. Sommer (Washington, DC), Cyrus T. Frelinghuysen (Washington, DC) - Previously represented Motorola Mobility, Inc. as an intervenor in a patent case.

For OnePlus Technology (Shenzhen) Co., LTD.:

• Perkins Coie, LLP
  • Babak Tehranchi (San Diego, CA) - Lead Counsel for OnePlus Technology (Shenzhen) Co., Ltd. in an inter partes review (IPR) proceeding (IPR2025-00762) against Pantech Corporation, related to Patent No. 10,863,573.
  • Yang-Hsien (Homer) Hsu (Seattle, WA) - Backup Counsel for OnePlus Technology (Shenzhen) Co., Ltd. in IPR2025-00762.
  • Note: Perkins Coie has represented OnePlus in PTAB proceedings, indicating their involvement in the company's broader patent defense strategy.
• Andy Tindel Attorney & Counselor At Law, P.C.
  • Andy Tindel (Tyler, TX) - Local counsel in the Eastern District of Texas for OnePlus Technology (Shenzhen) Co., Ltd. in a case filed by Pantech Corporation (5:22-cv-00069).
  • Note: Local counsel are commonly used in Eastern District of Texas cases.

For all defendants, a local counsel firm in the Eastern District of Texas would almost certainly be engaged. Common local counsel firms for patent litigation in this district include:

• Gillam & Smith LLP
• Ward Smith & Hill, PLLC
• Miller Fair Henry PLLC (though this firm is also listed as representing the plaintiff in other related cases, which could suggest a conflict or that different attorneys within the firm represent different parties across separate matters).

Important Note: Without direct PACER access to the docket for 2:25-cv-00171, this list is compiled from general knowledge of the firms representing these entities in similar patent litigation, particularly in the Eastern District of Texas and parallel PTAB proceedings. Counsel of record are formally entered on the court's docket, and this information would be the definitive source. Filings related to counsel appearances are generally not sealed.