Samsung Electronics America Inc. et al. v. Topwire LLC

Case Background: NPE Targets Samsung's Smartphone Packaging Technology

This Inter Partes Review (IPR) arises from a district court patent infringement suit and represents a strategic response by a major technology operating company against a non-practicing entity (NPE). The petitioner, Samsung Electronics, is a global leader in consumer electronics, mobile devices, and semiconductor manufacturing. The patent owner, Topwire LLC, is a recently formed Texas-based entity that acquired the patent-in-suit from the sole inventor in March 2025. This pattern of acquiring patents and then initiating litigation against large technology companies is characteristic of an NPE, or Patent Assertion Entity (PAE). Topwire's first litigation campaign, initiated in late 2025, also includes a parallel lawsuit against Apple, indicating a coordinated assertion strategy targeting major players in the smartphone market.

The dispute centers on U.S. Patent No. 9,859,202, which discloses a "semiconductor structure for separating and electrically connecting two layered packaging substrates." Topwire alleges that Samsung's high-end smartphones, specifically the Galaxy S10-series and later models, infringe the patent. The accused technology is the "double-layered logic board" or "substrate-like PCB" (Printed Circuit Board) within these devices, a space-saving design that allows for more components to be packed into a thin chassis. Samsung filed this IPR petition seeking to invalidate the '202 patent's claims, arguing they are unpatentable over prior art. This is a common defensive tactic for defendants in patent litigation, aiming to remove the patent threat at the U.S. Patent and Trademark Office's Patent Trial and Appeal Board (PTAB), which is often seen as a more favorable venue for accused infringers than district courts.

The underlying infringement case is Topwire LLC v. Samsung Electronics Co., Ltd. et al., Case No. 2:25-cv-01183, filed in the U.S. District Court for the Eastern District of Texas. The case has been assigned to Judge Rodney Gilstrap, whose court is one of the most popular venues for patent litigation in the United States, known for its expertise in handling complex patent cases and for being a favored jurisdiction for patent plaintiffs. The IPR filing by Samsung highlights the close strategic linkage between district court litigation and PTAB proceedings. The outcome of this IPR could significantly impact the district court case; if the PTAB invalidates the patent claims, it would likely terminate the Texas litigation. The case is notable for its classic NPE-versus-operating-company dynamic and its setting in a key patent litigation venue.

Litigation Timeline and Key Developments

As of May 1, 2026, the patent dispute between Topwire LLC and Samsung is proceeding on dual tracks: the infringement lawsuit in the Eastern District of Texas and the inter partes review (IPR) before the Patent Trial and Appeal Board (PTAB). The district court case is in its early stages, while the IPR petition was recently filed and awaits a decision on institution.

Chronological Developments:

• 2025-12-01: Complaint Filed. Topwire LLC filed a patent infringement lawsuit against Samsung Electronics Co., Ltd. and Samsung Electronics America, Inc. in the U.S. District Court for the Eastern District of Texas. The case, captioned Topwire LLC v. Samsung Electronics Co., Ltd. et al., 2:25-cv-01183, was assigned to District Judge Rodney Gilstrap and referred to Magistrate Judge Roy S. Payne. The complaint alleges that certain Samsung Galaxy smartphones, starting with the S10-series, infringe U.S. Patent No. 9,859,202 by incorporating a "double-layered logic board." Topwire also filed a parallel suit against Apple in the Western District of Texas on the same day.

• 2025-12-19: Samsung Obtains Extension to Respond. Samsung filed an unopposed motion for an extension of time to answer or otherwise respond to Topwire's complaint.

• 2025-12-23: Extension Granted. The court granted Samsung's motion, extending its response deadline to March 24, 2026.

• 2026-03-24 (Anticipated): Samsung's Answer & Counterclaims. While the docket is not fully current, Samsung's answer to the complaint and any counterclaims for non-infringement and invalidity would have been due on this date.

• 2026-03-31: Samsung Files IPR Petition. Samsung Electronics Co Ltd. and Samsung Electronics America Inc. filed a petition for inter partes review against U.S. Patent No. 9,859,202. The proceeding is assigned case number IPR2026-00324 at the PTAB. This filing represents Samsung's formal challenge to the patent's validity based on prior art.

• 2026-04-07: Docket Control Order Issued in District Court. The Eastern District of Texas issued a docket control order setting forth the case schedule. Key deadlines include a Markman/Claim Construction hearing set for July 9, 2027, and jury selection scheduled to begin on January 10, 2028. The issuance of this long-range schedule indicates the court is proceeding with the case despite the pending IPR.

Current Posture and Next Steps:

• District Court: The infringement case is in the early pleadings stage. Now that the IPR has been filed, a key strategic development to watch for is a motion from Samsung to stay the district court case pending the PTAB's review. Courts in the Eastern District of Texas often wait until after the PTAB decides whether to institute a review before ruling on such motions. Given the distant trial date, a stay is a significant possibility if the IPR is instituted.

• PTAB: The IPR petition is pending. Topwire LLC has the option to file a Preliminary Response within three months of the filing date (approximately late June 2026). The PTAB must then decide whether to institute the review within six months of the petition's filing date, meaning a decision is expected around the end of September 2026. If instituted, a final written decision on the patent's validity would be due within one year of institution (i.e., by late September 2027).

The outcome of the PTAB's institution decision will be a critical inflection point. If the review is instituted, it will exert significant pressure on Topwire and likely lead to a stay of the Texas litigation. If institution is denied, Samsung will lose its leverage at the PTAB and the district court case will proceed as the primary forum for the dispute.

Counsel for Plaintiff Topwire LLC

Topwire LLC has retained a combination of nationally recognized patent litigators and seasoned local Texas counsel, a common strategy for plaintiffs in the Eastern District of Texas. The legal team is comprised of attorneys from Stamoulis & Weinblatt LLC and Ward, Smith & Hill, PLLC.

Stamoulis & Weinblatt LLC

• Stamatios "Stam" Stamoulis (Lead Counsel)

  • Firm & Location: Stamoulis & Weinblatt LLC, Wilmington, DE.
  • Experience Note: Has over two decades of experience in intellectual property law, including time at Fish & Richardson, and has litigated patent cases in districts nationwide, including the Eastern District of Texas.

• Richard C. Weinblatt (Of Counsel)

  • Firm & Location: Stamoulis & Weinblatt LLC, Wilmington, DE.
  • Experience Note: Co-founder of Stamoulis & Weinblatt, with extensive experience in patent litigation and representing intellectual property owners.

Ward, Smith & Hill, PLLC

• T. John Ward (Local Counsel)

  • Firm & Location: Ward, Smith & Hill, PLLC, Longview, TX.
  • Experience Note: A former U.S. District Judge for the Eastern District of Texas, he is a highly respected expert in patent and complex commercial cases.

• Wesley Hill (Local Counsel)

  • Firm & Location: Ward, Smith & Hill, PLLC, Longview, TX.
  • Experience Note: Recognized for his courtroom success in patent infringement cases involving diverse technologies for both plaintiffs and defendants.

Defendant Representatives

For its defense in the Eastern District of Texas and in the parallel PTAB proceeding, Samsung has retained attorneys from Fish & Richardson P.C., a top-tier national intellectual property law firm, along with highly regarded local counsel from Gillam & Smith, LLP. This combination of national trial counsel and experienced local practitioners is standard for high-stakes patent litigation in this venue.

Fish & Richardson P.C.

• David M. Hoffman (Lead Counsel)

  • Firm & Location: Fish & Richardson P.C., Austin, TX.
  • Experience Note: A principal at the firm, Hoffman's practice focuses on complex patent litigation, and he has been recognized as a "Rising Star" in intellectual property litigation. He has experience in post-grant proceedings before the USPTO.

• Neil A. Smith (Of Counsel)

  • Firm & Location: Fish & Richardson P.C., Silicon Valley, CA.
  • Experience Note: A former Administrative Patent Judge at the PTAB's Silicon Valley office, he brings deep expertise in PTAB trial proceedings and patent dispute resolution.

• Tim Rawson (Of Counsel)

  • Firm & Location: Fish & Richardson P.C., Southern California.
  • Experience Note: Has represented Samsung in prior patent infringement cases involving semiconductor technology in the Eastern District of Texas.

Gillam & Smith, LLP

• Melissa R. Smith (Local Counsel)
  • Firm & Location: Gillam & Smith, LLP, Marshall, TX.
  • Experience Note: A partner at her firm, she is a highly experienced and respected trial lawyer in the Eastern District of Texas, frequently serving as local counsel in major patent infringement cases.