PTAB challenges

Proceedings overview

There is currently one AIA trial proceeding on file for US patent 7888195, which is active and pending an institution decision. This means the patent's validity is currently being challenged, and its claims have not yet been adjudicated by the PTAB.

IPR2026-00261 — Taiwan Semiconductor Manufacturing Company Ltd. v. Marlin Semiconductor Ltd

• Type: Inter Partes Review
• Filed: 2026-02-13
• Status: Pending. The petition has been filed and is awaiting a decision on institution.
• Judge panel: Information not yet publicly available as the case is still in the preliminary stages.
• Petition grounds: Information not publicly available yet; this detail would typically be found in the filed petition, which is not yet processed or searchable in enough detail to extract specific claims and prior art.
• Institution decision: Not yet issued. The statutory deadline for the PTAB to decide whether to institute this IPR is approximately 2026-08-13 (six months from the filing date).
• Final Written Decision: Not applicable; no institution decision has been made.
• Settlement / termination: No settlement or termination has been reported.
• Appeal: Not applicable; no Final Written Decision has been issued.
• Defensive value: This proceeding indicates that Taiwan Semiconductor Manufacturing Company Ltd. is challenging the validity of US7888195. Should the PTAB institute the IPR, the patent's claims will be formally reviewed. If a defendant is facing assertion from this patent, they should closely monitor the institution decision for IPR2026-00261, as an institution could signal weaknesses in the patent's claims and potentially lead to invalidation.

Strategic summary

Currently, the validity of US7888195 is under review due to a single Inter Partes Review, IPR2026-00261, filed by Taiwan Semiconductor Manufacturing Company Ltd. As this IPR is very recent, having been filed on February 13, 2026, there are no claims that have been canceled or sustained by the PTAB at this stage. All claims of US7888195 remain legally valid until an institution decision is made and, if instituted, a subsequent Final Written Decision.

The estoppel landscape is not yet defined, as the IPR has not been instituted. If the IPR is instituted, the petitioner (Taiwan Semiconductor Manufacturing Company Ltd.) and its privies would be estopped under 35 U.S.C. § 315(e)(2) from asserting invalidity grounds that were raised or reasonably could have been raised in the IPR. However, for other potential defendants, the full range of prior art grounds for invalidity remains available until the IPR concludes with a Final Written Decision and any subsequent appeals. The filing by Taiwan Semiconductor Manufacturing Company Ltd., a significant industry player, signals that they perceive a threat or issue with the patent's validity.

Recommended next steps

• Monitor IPR2026-00261 closely: The most critical upcoming milestone is the institution decision for IPR2026-00261, which is expected around 2026-08-13. This decision will determine whether the PTAB proceeds to a full trial on the merits of the patent's claims. You can track its progress on the USPTO PTAB E2E system by searching for IPR2026-00261.
• Review Petition Filings (if available): If you are a defendant, obtain and review the petition filed by Taiwan Semiconductor Manufacturing Company Ltd. for IPR2026-00261 as soon as it becomes publicly accessible and fully processed. This will reveal the specific claims being challenged and the prior art asserted against them, which could inform your own invalidity contentions.
• Consider parallel challenges: Given that an IPR has been filed, it suggests there may be viable prior art challenges against US7888195. If you are a defendant, this may be an opportune time to evaluate your own potential IPR or other invalidity challenges, considering the ongoing proceeding.