VB Assets, LLC v. Samsung Electronics Co., Ltd.

Case Background: NPE Asserts Voice-Recognition Patents Against Samsung's Bixby

This patent infringement lawsuit pits VB Assets, LLC, a non-practicing entity (NPE), against global electronics maker Samsung Electronics Co., Ltd. VB Assets, which does business as Voicebox Tech, enforces a portfolio of patents originating from VoiceBox Technologies, an early developer of conversational AI and natural language processing. This business model centers on licensing and litigating patents rather than producing a commercial product. The defendant, Samsung, is a major operating company whose allegedly infringing products include a wide array of devices—such as smartphones, tablets, smartwatches, and home appliances—that incorporate its Bixby 2.0 voice assistant. This case is one of several similar suits VB Assets has filed against other major technology companies, including Apple and Google, targeting their respective voice assistant platforms.

The litigation, filed October 9, 2024, is proceeding in the U.S. District Court for the Eastern District of Texas, Marshall Division, a venue that has regained its status as the nation's busiest and most influential for patent cases. This court is known for its experienced patent judges, case management practices that favor moving cases toward trial, and a track record of significant jury verdicts, making it a preferred forum for patent assertion entities. The case is assigned to Chief Judge Rodney Gilstrap. The core of the dispute involves several patents, including U.S. Patent No. 8,886,536, which VB Assets alleges is infringed by Samsung's Bixby 2.0 technology. The '536 patent, in simplified terms, relates to methods for a voice-enabled device to process user requests by understanding the context and intent behind the spoken words.

The case is notable as it represents a continuation of VB Assets' broad assertion campaign based on the former VoiceBox portfolio. This campaign has already seen success; in a prior case, a Delaware jury awarded VB Assets over $40 million in damages against Amazon for infringement by its Alexa voice assistant. The '536 patent was asserted in that Amazon case but was not part of the trial that resulted in the verdict. In response to the present lawsuit, Samsung has initiated an inter partes review (IPR) proceeding (IPR2025-00869) before the Patent Trial and Appeal Board (PTAB), challenging the validity of the '536 patent. This dual-front strategy—fighting the infringement claims in district court while simultaneously challenging the patent's validity at the U.S. Patent and Trademark Office—is a common defense tactic in high-stakes patent litigation. The outcome of this case could have significant implications for the voice assistant market, potentially affecting the features and licensing costs associated with conversational AI platforms.

Key Legal Developments in VB Assets v. Samsung

Case Stayed Pending Patent Office Review

The patent infringement litigation between VB Assets, LLC and Samsung Electronics Co., Ltd. over the Bixby 2.0 voice assistant is currently stayed, pending the outcome of an inter partes review (IPR) at the Patent Trial and Appeal Board (PTAB). This holding pattern is a common feature in modern patent disputes, where the validity of the asserted patent is challenged in a parallel administrative proceeding.

Here is a chronological summary of the key events in the case:

• 2024-10-09: Complaint Filed. VB Assets, LLC filed its complaint against Samsung in the U.S. District Court for the Eastern District of Texas, alleging that Samsung's Bixby 2.0 voice assistant and associated devices infringe U.S. Patent No. 8,886,536, among others. The complaint details a prior business relationship where Samsung evaluated VoiceBox's technology before ultimately developing its own Bixby assistant, which VB Assets contends now infringes on former VoiceBox patents.

• 2025-02-13 (approx.): Answer and Counterclaims Filed. Samsung filed its answer to the complaint, denying infringement and asserting counterclaims. While the specific counterclaims are not detailed in the available documents, they typically include requests for a declaratory judgment of non-infringement and invalidity of the asserted patent(s).

• IPR Petition Filed (IPR2025-00869). Samsung challenged the validity of the '536 patent by filing a petition for inter partes review with the PTAB. This move shifted a key part of the dispute from the district court to the specialized administrative body within the U.S. Patent and Trademark Office (USPTO).

• PTAB Institution of IPR. The PTAB instituted the IPR proceeding, determining that Samsung had established a "reasonable likelihood" that it would prevail in showing at least one of the challenged claims of the '536 patent is unpatentable. The specific date of the institution decision is not available in the search results, but it preceded the district court's stay. The institution of an IPR is a significant milestone, as a high percentage of instituted patents see at least some claims canceled.

• 2025-08-12: Motion to Stay Granted. Chief Judge Rodney Gilstrap granted Samsung's motion to stay the district court case pending the final written decision from the PTAB in the IPR. In his order, Judge Gilstrap noted that the PTAB's decision was expected well over a year before the case was scheduled for trial. Granting a stay under these circumstances serves judicial economy by avoiding potentially unnecessary litigation efforts if the patent is invalidated by the PTAB. Judge Gilstrap often requires all defendants to agree to be bound by the IPR estoppel provisions before granting a stay, a procedural point he has enforced in other cases.

Current Posture and Next Steps

As of today, May 7, 2026, the district court action remains stayed. The focus of the dispute is now squarely on the PTAB and the IPR2025-00869 proceeding. The parties will argue the patent's validity before a panel of administrative patent judges, with a final written decision expected within one year of the institution date.

The outcome of the PTAB proceeding will have a decisive impact on the litigation:

• If the PTAB finds the challenged claims of the '536 patent to be unpatentable, VB Assets will be statutorily estopped from asserting those claims in the district court, likely leading to the dismissal of a significant portion, if not all, of the case against Samsung.
• If the PTAB upholds the validity of the claims, the stay in the Eastern District of Texas will be lifted, and the case will proceed. Samsung, however, will be estopped from raising in court any invalidity arguments that it raised or reasonably could have raised during the IPR.

The case has not yet reached key pre-trial milestones such as a Markman hearing for claim construction or summary judgment motions. A preliminary schedule had set a Markman hearing for January 2026 and jury selection for July 2026, but these dates are now moot due to the stay. The case's future trajectory is entirely dependent on the PTAB's final written decision in IPR2025-00869.

Plaintiff's Counsel Represents a Mix of National and Local Texas Firms

Plaintiff VB Assets, LLC has assembled a legal team that combines a nationally recognized patent litigation boutique with seasoned East Texas trial lawyers, a common and effective strategy for cases filed in the U.S. District Court for the Eastern District of Texas. The team is led by attorneys from Stamoulis & Weinblatt LLC and supported by local counsel from Ward, Smith & Hill, PLLC and Parker, Bunt & Ainsworth, P.C.

Based on docket information and law firm profiles, the following attorneys have appeared on behalf of the plaintiff:

Lead Counsel

• Name: Stamatios "Sam" Stamoulis

  • Role: Lead Counsel
  • Firm: Stamoulis & Weinblatt LLC (Wilmington, DE)
  • Note: Co-founder of his firm, Stamoulis is a veteran patent litigator who has handled over 2,000 cases and frequently appears in major patent venues, including the Eastern District of Texas.

• Name: Richard C. Weinblatt

  • Role: Lead Counsel
  • Firm: Stamoulis & Weinblatt LLC (Wilmington, DE)
  • Note: An experienced patent litigator and registered patent agent, Weinblatt has successfully argued appeals at the Federal Circuit and focuses on patent litigation and appellate work.

Local Counsel

• Name: T. John "Johnny" Ward, Jr.

  • Role: Local Counsel
  • Firm: Ward, Smith & Hill, PLLC (Longview, TX)
  • Note: A founder of the firm and a highly-regarded East Texas trial lawyer, Ward has secured major verdicts in patent cases against companies like Apple, Samsung, and Microsoft.

• Name: Wesley Hill

  • Role: Local Counsel
  • Firm: Ward, Smith & Hill, PLLC (Longview, TX)
  • Note: Hill is recognized for his courtroom success in patent infringement and complex commercial litigation matters in the Eastern District of Texas.

• Name: Charles "Charlie" Ainsworth

  • Role: Local Counsel
  • Firm: Parker, Bunt & Ainsworth, P.C. (Tyler, TX)
  • Note: Ainsworth's firm specializes in civil litigation in East Texas and frequently serves as local counsel for national firms in intellectual property disputes.

This combination of counsel gives VB Assets both deep patent law expertise from the Stamoulis & Weinblatt firm and extensive local knowledge and trial experience within the Eastern District of Texas from the Ward, Smith & Hill and Parker, Bunt & Ainsworth firms.

Defendant's Counsel of Record

Samsung Electronics Co., Ltd. and its U.S. subsidiary are represented by a team of outside and local counsel from the firms Goodwin Procter LLP, Alston & Bird LLP, and Gillam & Smith, LLP.

Lead Counsel

Attorneys from Goodwin Procter and Alston & Bird appear to be sharing lead counsel responsibilities.

Name	Role	Firm	Office Location	Notable Experience
Darryl M. Woo	Lead Counsel	Goodwin Procter LLP	San Francisco, CA	A veteran IP trial lawyer, Woo has led high-stakes litigation for clients like Google Earth and the original Napster.
Douglas J. Kline	Lead Counsel	Goodwin Procter LLP	Boston, MA	With over 30 years of experience, Kline has served as lead trial counsel in numerous IP cases across the U.S., including for technology and life sciences companies.
Theodore Stevenson, III	Lead Counsel	Alston & Bird LLP	Dallas, TX	A prominent trial attorney with over 40 patent and technology cases tried, Stevenson is a leading expert in litigation involving standard-essential patents (SEPs) and FRAND obligations.

Of Counsel

Name	Role	Firm	Office Location	Notable Experience
Srikanth Reddy	Of Counsel	Goodwin Procter LLP	Boston, MA	Reddy's practice focuses on IP litigation, including patent, trademark, and trade secret matters, and he has experience before the ITC and PTAB.
Brady Randall Cox	Of Counsel	Alston & Bird LLP	Dallas, TX	Cox handles complex patent disputes in district courts, before the ITC, and at the PTAB, with expertise in telecommunications and computer hardware/software.

Local Counsel

As is standard practice in the Eastern District of Texas, Samsung has retained a local firm with deep experience in the district.

Name	Role	Firm	Office Location	Notable Experience
Melissa Richards Smith	Local Counsel	Gillam & Smith, LLP	Marshall, TX	A partner at the firm, Smith is a seasoned trial lawyer who has served as local counsel in over 3,000 patent cases in the Eastern District of Texas and has tried numerous cases to verdict for both plaintiffs and defendants.

In-House Counsel

While outside counsel handles the primary litigation tasks, Samsung's in-house team manages the overall strategy. Public filings have not yet indicated a formal notice of appearance by in-house counsel in this specific case, but key legal personnel at Samsung oversee such patent litigation.

Name	Role	Firm	Office Location	Notable Experience
Phillip Lee	In-House Counsel (presumed)	Samsung Electronics	Mountain View, CA	As Principal Legal Counsel, Lee is a veteran litigator who manages a docket of patent cases and has experience before numerous federal district courts, the PTAB, and the Federal Circuit.
Matthew Bathon	In-House Counsel (presumed)	Samsung Electronics	Washington, D.C.	As Principal Legal Counsel, Bathon's responsibilities include coordinating Samsung's ITC and district court patent litigation dockets.

Note on Counsel Discrepancy: Initial docket reports from late 2024 primarily listed Goodwin Procter and Gillam & Smith for the defendants. However, subsequent filings, including a June 2025 notice of deposition, list attorneys from Alston & Bird. This suggests either a change in representation or, more likely, a shared role where different firms handle distinct aspects of the overall dispute, such as Alston & Bird's significant involvement in the parallel inter partes review (IPR) proceedings before the Patent Trial and Appeal Board.