Articles Tagged: Prior Art


New PTAB Challenge Filed in IPR2026-00406 Involving Duke Manufacturing Co.

A new inter partes review petition has been filed at the Patent Trial and Appeal Board in IPR2026-00406, a proceeding captioned Duke Manufacturing Co. and opened on July 2, 2026. For patent practitioners tracking competitive challenges in the foodservice and commercial equipment space, this is a case worth watching as the record develops.

At this early stage, the PTAB docket indicates the filing of the IPR but may not yet reflect a fully developed public record identifying all details practitioners typically want immediately, including the specific patent claims challenged, the named petitioner and patent owner in full, and the precise prior-art combinations asserted in the petition.

Apple Targets Patent in Newly Filed PTAB Challenge, IPR2026-00316

Apple Inc. has launched a new inter partes review at the Patent Trial and Appeal Board, filing IPR2026-00316 on May 18, 2026. As of the initial docket entry, the proceeding is styled simply under Apple’s name, and practitioners will want to watch for the petition, mandatory notices, and any patent owner preliminary response to flesh out the dispute. You can track the docket here: View full case on Docket Alarm.

At this early stage, the publicly available case caption confirms the petitioner—Apple Inc.—but the docket details provided here do not yet identify the challenged patent number or the patent owner by name.

Okta Files IPR2026-00327 at the PTAB: A New Challenge to an Identity and Access Patent

Okta, Inc. has launched a new Patent Trial and Appeal Board proceeding,IPR2026-00327, filed on April 6, 2026. The petition places another technology-focused patent dispute before the PTAB and is one that in-house IP teams, patent litigators, and counsel following the identity and access management space will want to watch closely.

At this early stage, the publicly available docket identifiesOkta, Inc.as the petitioner in an inter partes review, but the full petition and supporting papers will be the key source for confirming thespecific patent being challenged, thepatent owner, and the exactclaims at issue. As is typical in PTAB practice, the petition is expected to lay out the challenged claims, identify the real parties in interest, and present the unpatentability theories based on prior art patents and printed publications.

Inter partes review is a targeted vehicle for attacking issued patent claims under35 U.S.C. §§ 102 and 103. In practical terms, that means the grounds for review in this case will likely turn on whether Okta contends the challenged claims areanticipatedby a single reference orobviousin view of combinations of prior art.