PTAB challenges

Proceedings overview

There is one active AIA trial proceeding on file for US Patent 10,200,654. The proceeding, IPR2026-00266, is currently pending, meaning no claims have been invalidated or sustained by the PTAB yet. This suggests the patent's claims remain untested by a final written decision, offering a defendant an opportunity to pursue an IPR-based defense.

IPR2026-00266 — Cisco Systems, Inc. v. ZUGARA Inc.

• Type: Inter Partes Review
• Filed: 2026-03-04
• Status: Pending. The petition has been filed, and the proceeding is in its initial stages, awaiting a decision on institution.
• Judge panel: Information regarding the specific Administrative Patent Judges (APJs) assigned to this panel is not publicly available at this early stage.
• Petition grounds: The claims challenged and the specific prior art grounds (§ 102 / § 103) are not yet publicly detailed in a decision document as the case is still pending institution.
• Institution decision: As of 2026-05-29, an institution decision has not yet been issued. A decision on whether to institute the IPR is typically rendered within six months of the patent owner's preliminary response or within 12 months of the petition filing date if no preliminary response is filed.
• Final Written Decision: No Final Written Decision has been issued, as the case is still pending institution.
• Settlement / termination: No settlement or termination has been reported for this pending proceeding.
• Appeal: No appeal to the Federal Circuit has occurred, as the proceeding is still pending at the PTAB.
• Defensive value: This active IPR indicates that the patent's validity is currently being challenged. While no claims have been invalidated, the outcome of this proceeding, particularly the institution decision and any subsequent final written decision, will significantly impact the defensive posture against this patent.

Strategic summary

As of the current date, no claims of US Patent 10,200,654 have been canceled or sustained by the PTAB. The patent has one active Inter Partes Review, IPR2026-00266, which was filed by Cisco Systems, Inc. and is currently pending institution. This means all claims of the patent, 1-53, remain untested by a final PTAB decision.

The estoppel landscape under § 315(e)(2) will only become relevant if IPR2026-00266 is instituted and proceeds to a Final Written Decision. If institution is denied, no estoppel attaches. If instituted and a Final Written Decision is issued, Cisco Systems, Inc. and parties in privity with them would be estopped from asserting invalidity grounds that were raised or reasonably could have been raised during the IPR. For other potential defendants, the prior-art grounds challenged in IPR2026-00266 would remain available unless they are found to be in privity with Cisco Systems, Inc. or have otherwise participated in the proceeding.

There are no observable patterns of multiple IPR filings by the same petitioner on this specific patent. Unified Patents is noted as a data source, but Cisco Systems, Inc. is the petitioner in the pending IPR. The patent owner's approach to PTAB appeals cannot be determined as no final written decision has been issued.

Recommended next steps

• Given that IPR2026-00266 is pending, closely monitor the USPTO PTAB End-to-End (E2E) system for updates, particularly the institution decision. The decision on institution is a critical milestone, as it will indicate whether the PTAB believes there is a reasonable likelihood that at least one challenged claim is unpatentable. The statutory deadline for this decision is typically within six months of the patent owner's preliminary response.
• If you are a defendant facing assertion of this patent, consider the grounds raised in IPR2026-00266 and evaluate whether similar or additional prior art grounds could be presented in a separate IPR petition, assuming no privity or other estoppel issues.
• If the IPR is instituted, track the trial schedule, including the oral hearing and the statutory 1-year deadline for the Final Written Decision from institution.
• Access the public docket for IPR2026-00266 on the USPTO PTAB E2E system for the most up-to-date information on filings and procedural events.