PTAB challenges

Proceedings overview

There is one AIA trial proceeding on file for US patent 11878729, which resulted in a discretionary denial of institution. This means no claims of the patent were challenged on the merits in this particular proceeding, leaving all claims untested by this IPR. For a defendant, this indicates the patent claims remain as granted by the USPTO, and a defense based on this specific IPR's outcome is not available.

IPR2025-01120 — Baby Generation, Inc. d/b/a Mockingbird et al. v. Baby Jogger II LLC

• Type: Inter Partes Review
• Filed: 2025-06-13
• Status: Discretionary Denial (The petition was denied institution, so the IPR did not proceed to a full trial on the merits).
• Judge panel: Not publicly available from the search results for discretionary denials at this stage.
• Petition grounds: The specific claims challenged and prior art grounds are not detailed in public summaries for discretionary denials, as the merits were not fully adjudicated.
• Institution decision: Denied (date: 2026-01-05). The petition was denied institution due to a discretionary denial.
• Final Written Decision (if issued): Not applicable, as institution was denied.
• Settlement / termination: Not applicable, as institution was denied.
• Appeal: Not applicable, as institution was denied, and there's no FWD to appeal.
• Defensive value: This proceeding did not result in any claims being canceled or sustained. The discretionary denial means the patent claims were not substantively challenged in this IPR. Therefore, this IPR provides no direct benefit for a defendant seeking to invalidate claims of US11878729. Any future IPR would need to establish different grounds or overcome the discretionary denial factors raised in this proceeding.

Strategic summary

All claims of US11878729 remain UNTESTED by a full IPR trial process, as the sole IPR filed, IPR2025-01120, was denied institution on discretionary grounds. This means the patent has not been narrowed through any AIA trial proceeding, and its claims stand as originally granted.

Regarding the estoppel landscape, since IPR2025-01120 was denied institution, statutory estoppel under 35 U.S.C. § 315(e)(2) does not apply to the petitioner, Baby Generation, Inc. d/b/a Mockingbird et al., or their privies for the grounds raised in that petition. This is because estoppel only attaches upon a final written decision. However, the Board's decision to discretionarily deny institution might still influence future petitions, particularly if similar procedural or policy reasons are present. Potential defendants not privy to Baby Generation, Inc. d/b/a Mockingbird et al. are free to challenge any claim of US118778729 on any available prior art grounds, subject to the Board's discretion.

There are no apparent pattern signals such as multiple IPRs by the same petitioner or aggressive PTAB appeals by the patent owner, as only one IPR was filed and it did not proceed to trial. The petitioner, Baby Generation, Inc. d/b/a Mockingbird et al., is a known entity that has engaged in patent challenges, suggesting a defensive interest in this patent space.

Recommended next steps

If you are a defendant facing assertion of US11878729, the claims of the patent have not been substantively challenged in an AIA trial. The denial of institution in IPR2025-01120 means the patent claims retain their original scope.

Consider conducting a thorough prior art search to identify new and compelling invalidity grounds. If new prior art is found, or if the discretionary denial reasoning for IPR2025-01120 can be overcome, filing a new IPR petition might be a viable defensive strategy. Given the previous discretionary denial, careful attention should be paid to the Board's reasoning in that decision to avoid similar outcomes in any future filing.

The status of IPR2025-01120 is "Discretionary Denial," and it was last modified on 2026-01-05. This proceeding is closed, and no active milestones are pending. The absence of instituted PTAB activity might suggest that the patent has not yet faced a strong enough challenge to overcome the institution threshold or that prior art grounds were not considered sufficiently compelling by the Board to institute a trial.

You can find the details of the IPR proceeding on the Unified Patents PTAB portal (a reliable source for PTAB data).