PTAB challenges

Proceedings overview

One AIA trial proceeding has been filed against US patent 9337193. The status is "Institution Denied", meaning all challenged claims were sustained. This gives a defendant a stronger defensive posture, as the patent has withstood an IPR challenge at the institution stage.

IPR2025-01054 — Taiwan Semiconductor Manufacturing Company Limited v. Chin-I Liao et al

• Type: Inter Partes Review
• Filed: 2025-08-20
• Status: Institution Denied. The PTAB declined to institute a trial.
• Judge panel: Not publicly available yet for this institution decision.
• Petition grounds: The exact claims and prior art challenged are not available from the provided data, but the petition was likely based on novelty (§ 102) and/or obviousness (§ 103) grounds.
• Institution decision: Denied (2026-04-13). The PTAB denied institution of the IPR, meaning the petitioner did not demonstrate a reasonable likelihood that at least one of the challenged claims is unpatentable.
• Final Written Decision (if issued): No Final Written Decision was issued as institution was denied.
• Settlement / termination: Not applicable, as institution was denied.
• Appeal: Not applicable, as institution was denied.
• Defensive value: The patent owner prevailed at the institution stage. This means that, for a potential defendant, an IPR-based defense using the same or substantially similar prior art grounds as IPR2025-01054 would be more difficult.

Strategic summary

The single AIA trial proceeding against US9337193, IPR2025-01054, resulted in a denial of institution on 2026-04-13. This means that all claims challenged in the petition remain patentable. As the institution was denied, no claims of US9337193 have been canceled or narrowed through IPR. All claims of the patent are currently sustained and untested by a final written decision.

Regarding the estoppel landscape, for the petitioner, Taiwan Semiconductor Manufacturing Company Limited, and its privies, § 315(e)(2) bars them from raising any ground they raised or reasonably could have raised in IPR2025-01054. For other defendants, prior art grounds are still available. However, the fact that the PTAB denied institution suggests that the particular arguments or prior art presented in IPR2025-01054 were not deemed strong enough to meet the institution threshold. There is no information to suggest a pattern of multiple IPRs by the same petitioner or aggressive PTAB appeals by the patent owner from the provided data. Unified Patents is noted as associated with the IPR.

Recommended next steps

If you are a defendant facing assertion of this patent, it is important to understand the specific prior art and arguments presented in IPR2025-01054 and why institution was denied. While the full institution decision is not available in the provided data, reviewing it would be crucial. The fact that institution was denied makes an IPR-based defense more challenging, but not impossible, especially if new and stronger prior art or different arguments can be presented. You should analyze whether your infringement theories rely on the claims that were challenged in IPR2025-01054.