TurboCode LLC v. TCL Technology

Case Overview and Background

Parties and Accused Technology

This patent infringement suit was brought by TurboCode LLC, a non-practicing entity (NPE) associated with inventor Jeffrey M. Gross, against TCL Technology, a major Chinese multinational electronics company. TurboCode LLC has engaged in a broad litigation campaign, asserting its patent rights against dozens of technology companies. TCL Technology is an operating company that develops, manufactures, and sells a wide range of consumer electronics, including televisions, mobile phones, and other smart devices. The lawsuit accused TCL's lineup of 5G-capable products, such as smartphones and tablets, of infringing TurboCode's patent. The core of the dispute focused on the use of specific error-correction methods in the signal processing of these 5G devices.

Asserted Patent and Procedural Posture

The single patent-in-suit was U.S. Patent No. 6,813,742, titled "High speed turbo codes decoder for 3G using pipelined SISO log-map decoders architecture." The '742 patent describes a method for efficiently decoding "turbo codes," a type of forward error-correcting code used to achieve reliable data transmission in wireless communications, particularly in 3G and 4G standards. TurboCode LLC alleged that although 5G standards primarily use newer LDPC codes for data channels, turbo codes are still employed for control channel encoding, making TCL's 5G products infringing. The case was filed in the U.S. District Court for the Western District of Texas (W.D. Tex.), a venue that became a hotbed for patent litigation under Judge Alan D. Albright, who was assigned to this case. At its peak, Judge Albright's court handled nearly 25% of all U.S. patent cases, attracting plaintiffs with his fast trial schedules and reluctance to transfer cases or stay them for administrative review.

Notability and Resolution

The case is notable as part of a persistent and widespread litigation campaign by an NPE against numerous operating companies in the telecommunications sector. The assertion of a patent originally developed for 3G technology against modern 5G devices highlights the legal strategy of leveraging legacy patents to cover features in next-generation products. The litigation's venue in W.D. Texas is also significant; while the court's dominance has waned following a 2022 order to randomly assign patent cases, Judge Albright's influence shaped patent litigation strategy for several years. The case terminated on January 4, 2024, after the parties filed a joint motion to dismiss with prejudice, which was granted by Judge Albright. This resolution strongly suggests a confidential settlement was reached, a common outcome in litigation between NPEs and large operating companies. Underscoring the patent's continued relevance, on April 14, 2026, industry group Unified Patents filed a request for an ex parte reexamination of the '742 patent, which could impact future enforcement efforts by TurboCode.

Key Legal Developments and Outcome

The litigation between TurboCode LLC and TCL Technology in the Western District of Texas followed a trajectory common for non-practicing entity (NPE) cases in that venue, characterized by initial procedural jockeying, a stay pending the outcome of parallel administrative proceedings, and an eventual resolution through a likely settlement before significant litigation milestones were reached.

Chronology of Key Events:

• 2022-11-14: Complaint Filed. TurboCode LLC filed its complaint against TCL Technology and its related entities, TCT Mobile (US) Inc. and TTE Technology, Inc., alleging infringement of U.S. Patent No. 6,813,742. The complaint accused TCL's 5G-capable products, including various smartphones, of infringing the patent by practicing the 5G New Radio (NR) standard, which allegedly utilizes turbo codes for control channel communications. (1:22-cv-01163, Dkt. 1).
• 2023-01-27: Defendant's Answer and Counterclaims. TCL filed its answer, denying infringement and asserting invalidity of the '742 patent as an affirmative defense. TCL also filed counterclaims seeking a declaratory judgment of non-infringement and invalidity of the '742 patent. (1:22-cv-01163, Dkt. 15).
• 2023-02-17: TCL's Motion to Dismiss for Improper Venue. TCL moved to dismiss the case, arguing that the Western District of Texas was an improper venue for the litigation against it. (1:22-cv-01163, Dkt. 19). This type of motion became increasingly common and successful in challenging filings against foreign parent corporations in popular patent venues.
• 2023-03-24: TCL's Unopposed Motion to Stay. Before the court ruled on the motion to dismiss, TCL filed an unopposed motion to stay the entire case. The basis for the stay was a pending Inter Partes Review (IPR) proceeding before the Patent Trial and Appeal Board (PTAB) that challenged the validity of the '742 patent. This IPR was filed by Ericsson Inc. (IPR2023-00089), another defendant sued by TurboCode in a separate case. Given that the PTAB had instituted review, indicating a reasonable likelihood that at least one challenged claim was unpatentable, a stay was mutually agreeable to conserve resources pending the PTAB's final decision.
• 2023-03-27: Case Stayed. Judge Alan D. Albright granted the unopposed motion, staying the case and administratively closing it pending the final resolution of the IPR proceeding. The order required the parties to submit joint status reports following significant developments at the PTAB. (1:22-cv-01163, Dkt. 26).
• 2024-01-04: Joint Motion to Dismiss with Prejudice. The parties filed a joint stipulation of dismissal with prejudice. The filing stated that all claims and counterclaims between TurboCode and TCL should be dismissed, with each party bearing its own attorneys' fees, costs, and expenses. (1:22-cv-01163, Dkt. 29). This type of filing almost invariably follows a confidential settlement agreement between the parties.
• 2024-01-04: Case Dismissed. On the same day, the court entered an order dismissing the case with prejudice, officially terminating the litigation. (1:22-cv-01163, Dkt. 30).

Parallel PTAB Proceedings:

A key factor influencing the district court litigation was the parallel challenge to the '742 patent's validity at the PTAB.

• IPR by Ericsson (IPR2023-00089): Ericsson Inc., which had been sued by TurboCode in the Eastern District of Texas, filed an IPR petition against the '742 patent on October 21, 2022. The PTAB instituted trial on all challenged claims on May 3, 2023. The institution of this IPR provided the direct impetus for TCL and TurboCode to agree to stay their own litigation. Ultimately, the PTAB issued a Final Written Decision on April 26, 2024, finding all challenged claims (1-3, 5, 6, 8, 9, 11, 12, and 14-16) unpatentable. While this decision came after the TCL case was dismissed, the high probability of this outcome following institution likely motivated TurboCode to settle with various defendants, including TCL.
• Ex Parte Reexamination (90/015,147): Further pressuring the patent owner, on April 14, 2026, industry group Unified Patents filed a request for ex parte reexamination of the '742 patent, presenting new prior art challenges. This action, though occurring after the TCL case concluded, demonstrates the continued industry-wide effort to invalidate the patent and will affect any future litigation TurboCode might contemplate.

In summary, the litigation was short-lived. The challenge to the patent's validity at the PTAB by another defendant (Ericsson) proved decisive, leading TCL and TurboCode to pause their court case. The likely settlement and subsequent dismissal allowed TCL to exit the litigation efficiently, while the later PTAB decision finding the patent claims unpatentable significantly weakened TurboCode's broader enforcement campaign.

Counsel for Plaintiff TurboCode LLC

Based on a review of the court docket and other legal sources, TurboCode LLC was represented by attorneys from two law firms, Stamoulis & Weinblatt LLC and Offit Kurman, P.A. These firms frequently represent non-practicing entities (NPEs) in patent litigation across the United States.

• Stamatios "Stam" Stamoulis - Lead Counsel

  • Firm: Stamoulis & Weinblatt LLC (Wilmington, DE)
  • Note: Stamoulis has over 20 years of experience in intellectual property litigation, having previously worked at O'Melveny & Myers and the IP boutique Fish & Richardson before co-founding his own firm, which is regularly retained by plaintiffs in patent cases.

• Richard C. Weinblatt - Lead Counsel

  • Firm: Stamoulis & Weinblatt LLC (Wilmington, DE)
  • Note: Weinblatt has extensive experience in patent litigation and appeals, having successfully argued before the U.S. Court of Appeals for the Federal Circuit in notable cases like Visual Memory, LLC v. NVIDIA Corp.

• Matthew F. D'Annunzio - Of Counsel

  • Firm: Offit Kurman, P.A. (Philadelphia, PA)
  • Note: D'Annunzio is a commercial litigator with a national practice who often represents businesses in high-stakes litigation and serves as outside general counsel.

Counsel for Defendant(s) TCL Technology

Based on court filings, the defendants—TCL Technology Group Corporation, TCT Mobile (US) Inc., and TTE Technology, Inc.—were represented by attorneys from the global intellectual property law firm Fish & Richardson P.C. The legal team was primarily based out of the firm's Texas offices.

• Neil J. McNabnay - Lead Counsel

  • Firm: Fish & Richardson P.C. (Dallas, TX)
  • Note: McNabnay is a principal with extensive experience serving as defense counsel in large-scale patent litigation involving technologies such as semiconductors, software, and telecommunications.

• Ricardo J. "Riqui" Bonilla - Principal

  • Firm: Fish & Richardson P.C. (Dallas, TX)
  • Note: Bonilla's practice focuses on complex intellectual property litigation, and he has represented clients in numerous high-stakes patent cases in Texas federal courts.

• Ryan McCarthy - Of Counsel

  • Firm: Fish & Richardson P.C. (Austin, TX)
  • Note: McCarthy has experience in patent litigation teams and also counsels clients on IP strategy, patent prosecution, and portfolio management, particularly in emerging technologies.

• Heather Flanagan - Local Counsel

  • Firm: Fish & Richardson P.C. (Austin, TX)
  • Note: Flanagan is the managing principal of the firm's Austin office and a member of its management committee, focusing on IP asset protection and client counseling.