Hisense USA Corp. v. Light Guide Innovations LLC

Hisense USA Corp. (Hisense), a major consumer electronics and appliance manufacturer, initiated an Inter Partes Review (IPR) against Light Guide Innovations LLC, a Non-Practicing Entity (NPE). Hisense USA is the U.S. headquarters of the Hisense Group, a global company specializing in products such as televisions and home appliances. Light Guide Innovations LLC, identified as an entity of Anjay Venture Partners LLC, is involved in asserting patents, particularly those acquired from other companies.

The IPR, designated IPR2025-01537, targeted U.S. Patent 7,936,415, titled "Light guide plate and display device having the same." This patent generally relates to a light guide plate designed to enhance light uniformity and brightness in a display device, featuring a light incident surface, a light emitting surface, and a bottom surface with a pattern of varying widths. This patent is part of a portfolio related to backlight units and LED strips used in liquid crystal display (LCD) TVs, which Light Guide Innovations LLC has asserted in an underlying patent infringement lawsuit against Hisense in the Eastern District of Texas (Light Guide Innovations LLC v. Hisense Company Ltd. et al., 2:25-cv-00051), filed on January 17, 2025. The accused products are Hisense's consumer electronics, specifically its televisions incorporating such display technology.

The case was filed at the Patent Trial and Appeal Board (PTAB) on September 19, 2025, and was terminated on January 16, 2026, with a status of "Not Instituted - Procedural." This procedural denial is notable as it falls within a period (late 2025/early 2026) when the USPTO Director implemented new policies aimed at reducing IPR institution, especially in cases with parallel district court litigation. These policies often require petitioners to make stipulations about not raising the same invalidity grounds in other proceedings or can lead to discretionary denials based on factors such as the likelihood of a district court trial concluding first.

The case highlights common trends in patent litigation: an NPE asserting acquired patents against a large operating company in the Eastern District of Texas, followed by the target company's attempt to challenge patent validity through an IPR at the PTAB. The "Not Instituted - Procedural" outcome underscores the PTAB's recent shifts in discretionary denial practices, which can significantly impact a petitioner's ability to challenge patents outside of district court.

The provided case, Hisense USA Corp. v. Light Guide Innovations LLC, IPR2025-01537, is an Inter Partes Review (IPR) proceeding before the Patent Trial and Appeal Board (PTAB), not a district court patent infringement litigation. Therefore, many of the requested litigation-specific milestones, such as complaints, answers, Markman hearings, discovery, and trial verdicts, are not directly applicable.

Instead, the key developments for this IPR case relate to its filing and the PTAB's decision on institution. The IPR was filed by Hisense USA Corp. to challenge US Patent 7,936,415, owned by Light Guide Innovations LLC.

Key Legal Developments and Outcome for IPR2025-01537:

• IPR Petition Filed (2025-09-19): Hisense USA Corp. filed a petition for Inter Partes Review, IPR2025-01537, challenging U.S. Patent No. 7,936,415, owned by Light Guide Innovations LLC.
• Non-Institution Decision - Procedural (2026-01-16): The PTAB terminated the IPR by issuing a decision not to institute review on procedural grounds. The PTAB's decision not to institute on procedural grounds may be related to recent policy shifts by the USPTO Director regarding discretionary denials, which took effect around October 2025 and January 2026. These policy shifts include requiring stipulations regarding parallel litigation and enhanced scrutiny of real parties in interest, particularly those linked to foreign governments.

Parallel Patent Infringement Litigation:

While IPR2025-01537 itself is not a district court litigation, Light Guide Innovations LLC has initiated patent infringement lawsuits against Hisense entities in the Eastern District of Texas concerning related patents, which likely motivated Hisense's IPR filings.

• Light Guide Innovations LLC v. Hisense Company Ltd. et al. (E.D. Tex. Case No. 2:25-cv-00051): Light Guide Innovations LLC filed a patent infringement complaint against Hisense Company Ltd. and several other Hisense entities in the U.S. District Court for the Eastern District of Texas on January 17, 2025. This complaint alleges infringement of patents related to LED backlight assemblies, lenses, and display components. U.S. Patent No. 7,936,415, the patent challenged in IPR2025-01537, is among the patents asserted by Light Guide Innovations LLC in other related litigations.

The procedural non-institution of IPR2025-01537 suggests that the PTAB declined to proceed with the review, potentially due to factors such as existing district court litigation, stipulations from Hisense regarding its invalidity challenges in other venues, or issues related to the identification of real parties in interest. Recent USPTO policies have focused on reducing duplicative challenges and ensuring that petitioners disclose all real parties in interest, particularly in cases involving foreign entities.

Counsel for Hisense USA Corp. in IPR2025-01537

Based on available information for closely related proceedings, Heath J. Briggs of Greenberg Traurig, LLP is identified as counsel for Hisense USA Corp. While direct counsel listings for IPR2025-01537 were not immediately available through public web searches, Heath Briggs is listed as Petitioner Counsel for Hisense USA Corp. in IPR2025-01538, Hisense USA Corp. et al. v. Light Guide Innovations LLC, which involves the same parties and was filed around the same time, challenging a related patent. Given the strong correlation between these inter partes review proceedings, it is highly probable that he also represented Hisense USA Corp. in IPR2025-01537.

Attorney: Heath J. Briggs
Role: Lead Counsel (inferred from role in related IPR)
Firm: Greenberg Traurig, LLP
Office Location: Denver, Colorado (Greenberg Traurig has multiple offices; his professional profile typically lists a primary office).
Relevant Patent Litigation Experience: Heath Briggs is a Shareholder and Global Co-Chair of Patent Prosecution at Greenberg Traurig. He possesses over 19 years of patent prosecution experience and 10 years of AIA trial experience. He has represented numerous entities in over 120 inter partes review (IPR) proceedings across a wide array of technologies, including LEDs, computer software/telecommunications, medical devices, and complex material systems. He was ranked by Patexia as one of the most active and best-performing IPR attorneys. Notable past cases include drafting the Patent Owner response that led to the PTAB's Becton factors (in Becton, Dickinson and Company v. B. Braun Melsungen AG) and serving as lead practitioner in Samsung Elecs. Am., Inc. v. Prisua Eng'g Corp.

Light Guide Innovations LLC is represented by attorneys from Fabricant LLP and Ward, Smith & Hill, PLLC (now Miller Fair Henry PLLC) in the parallel patent infringement case, Light Guide Innovations LLC v. Hisense Company Ltd. et al. (E.D. Tex. Case No. 2:25-cv-00051).

Counsel of Record for Light Guide Innovations LLC:

• Vincent J. Rubino, III

  • Role: Lead Counsel
  • Firm: Fabricant LLP
  • Office Location: Rye, New York
  • Experience Note: Mr. Rubino has been identified as lead counsel for Light Guide Innovations LLC in related IPR proceedings and appears to be heavily involved in the patent infringement litigation against Hisense.

• Alfred Ross Fabricant

  • Role: Counsel
  • Firm: Fabricant LLP
  • Office Location: New York

• Peter Lambrianakos

  • Role: Counsel
  • Firm: Fabricant LLP

• Jacob Daniel Ostling

  • Role: Counsel
  • Firm: Fabricant LLP
  • Office Location: Rye, New York

• Andrea Fair

  • Role: Counsel (with expertise in intellectual property litigation)
  • Firm: Ward, Smith & Hill, PLLC (now Miller Fair Henry PLLC)
  • Office Location: Longview, Texas
  • Experience Note: Ms. Fair is recognized for excellence in intellectual property litigation and has secured multi-million dollar jury verdicts in patent infringement cases. Her firm frequently appears before federal courts in the Eastern District of Texas.

• Claire Abernathy Henry

  • Role: Counsel
  • Firm: Ward, Smith & Hill, PLLC (now Miller Fair Henry PLLC)
  • Office Location: Longview, Texas
  • Experience Note: Ms. Henry represents plaintiffs and defendants in high-stakes patent litigation matters in the Eastern and Western Districts of Texas.

It's important to note that Ward, Smith & Hill, PLLC transitioned to Miller Fair Henry PLLC as of October 1, 2024, with Andrea Fair and Claire Abernathy Henry becoming named partners.