Pinterest, Inc. has filed a new inter partes review petition at the Patent Trial and Appeal Board, opening IPR2026-00366 on May 22, 2026. For patent litigators and in-house IP teams, the filing is worth watching not only for the substantive patentability issues it may raise, but also for what it could signal about Pinterest’s broader litigation and defensive patent strategy.

At this stage, the PTAB docket identifies the proceeding by petitioner name—Pinterest, Inc.—but practitioners should review the underlying petition papers on Docket Alarm for the specific patent number, challenged claims, and real-party-in-interest disclosures as they become available.

ATT Services, Inc. has launched a new inter partes review at the Patent Trial and Appeal Board, filing IPR2026-00349 on May 5, 2026. At this early stage, the proceeding is notable less for any merits ruling and more for what it signals: another major operating company turning to the PTAB as part of a broader patent-defense playbook.

Based on the case caption, ATT Services, Inc. is the petitioner.

Toyota Motor Corporation has filed a new inter partes review petition at the Patent Trial and Appeal Board, opening IPR2026-00333 on April 7, 2026. At this early stage, the docket identifies Toyota as the petitioner, but practitioners will want to monitor the record closely as the challenged patent, real parties in interest, and the full invalidity theories are fleshed out through the petition and any preliminary response.

An IPR filing is often an early signal of a broader enforcement fight or a parallel district court campaign, making proceedings like this one worth following even before institution.