PTAB challenges

Proceedings overview

There has been one inter partes review (IPR) filed against U.S. Patent No. 11,104,245. That proceeding, IPR2026-00059, is currently active, with the Patent Trial and Appeal Board (PTAB) having instituted trial. This means the patent is vulnerable, but no claims have yet been invalidated. For a defendant, this is a positive but preliminary development; the patent remains presumptively valid until a final decision is issued.

IPR2026-00059 — Toyota Motor Corporation et al. v. Emerging Automotive LLC

• Type: Inter Partes Review
• Filed: 2025-10-21
• Status: Trial Instituted. The PTAB has determined that the petitioner has shown a reasonable likelihood of prevailing on at least one of the challenged claims.
• Judge panel: I am unable to access the very latest PTAB case data, so the names of the Administrative Patent Judges (APJs) on the panel are not yet in the public data sources I can consult. This information is available in the public record on the USPTO's PTAB E2E portal.
• Petition grounds: I am unable to access the specific petition documents through my current tools. However, IPRs are typically based on prior art patents and printed publications under statutory grounds of anticipation (§ 102) and obviousness (§ 103). The petition would have identified specific claims of the '245 patent and the prior art references asserted against them.
• Institution decision: The trial was instituted on 2026-05-11. The PTAB's decision to institute means that Toyota demonstrated a reasonable likelihood that it would prevail in showing the unpatentability of at least one of the challenged claims based on the presented prior art and arguments.
• Final Written Decision: Not yet issued. A Final Written Decision is typically due within one year of the institution date, which would be on or before 2027-05-11.
• Settlement / termination: There is no public record of a settlement at this time. The proceeding's status is "Trial Instituted," indicating it is moving forward.
• Appeal: Not applicable, as no Final Written Decision has been issued.
• Defensive value: The institution of this IPR is a significant positive development for a defendant. It indicates that a panel of expert PTAB judges found the invalidity arguments credible. A defendant should closely monitor this proceeding, as a final decision canceling claims could resolve an infringement assertion. The arguments and evidence presented by Toyota may also be highly relevant to a defendant's own invalidity contentions in district court.

Strategic summary

Currently, no claims of U.S. Patent No. 11,104,245 have been canceled or finally determined to be patentable by the PTAB. All claims remain active and presumptively valid, but they are now under review in an IPR. The institution of IPR2026-00059 suggests that the prior art asserted by Toyota poses a credible threat to the patent's validity.

For a defendant, the estoppel landscape is not yet a concern, but it is developing. If Toyota's IPR proceeds to a Final Written Decision, Toyota (and any "real party in interest" or "privy" to Toyota) will be estopped from raising in district court any invalidity ground that it raised or "reasonably could have raised" in the IPR. Other potential defendants, however, are not yet directly affected by estoppel. They remain free to challenge the patent's validity in court or at the PTAB using different prior art or arguments. The existence of a single IPR by a major automotive manufacturer suggests that this patent is being actively asserted and may attract further validity challenges from others in the industry.

Recommended next steps

A defendant accused of infringing U.S. Patent No. 11,104,245 should take the following steps:

1. Monitor IPR2026-00059 Closely: The outcome of this proceeding could be dispositive. Key upcoming milestones include the Patent Owner's Response, the oral hearing (typically held 8-9 months after institution), and the Final Written Decision, which is statutorily due by 2027-05-11. All public documents, including the petition and the institution decision, can be accessed via the USPTO's PTAB E2E portal by searching for the proceeding number IPR2026-00059.

2. Analyze the IPR Petition and Institution Decision: Obtain these documents from the PTAB E2E portal immediately. The petition will detail the specific claims challenged and the prior art references used. The Board's institution decision will explain which grounds it found persuasive. This analysis will provide a powerful roadmap for your own invalidity case and highlight the claims the PTAB considers most vulnerable.

3. Consider a Stay of Any District Court Litigation: Given that the PTAB has instituted a trial, a defendant in a parallel district court case has a strong argument for requesting a stay of that litigation pending the outcome of the IPR. Courts frequently grant such stays to conserve judicial resources and benefit from the USPTO's expertise.