In a July 29, 2026 final written decision, the Patent Trial and Appeal Board held that the petitioner failed to prove any challenged claim unpatentable in IPR2025-00574. The judgment, issued under 35 U.S.C. § 318(a), is a complete defense win for the patent owner: none of the instituted challenges succeeded.

At a high level, that means the Board was not persuaded that the prior art and supporting expert testimony carried the petitioner’s burden by a preponderance of the evidence.

The Patent Trial and Appeal Board’s Final Written Decision in IPR2025-00565 offers another useful look at how the Board is evaluating invalidity challenges at the merits stage—and what practitioners must do to carry their burdens through trial. Although the case turns on the particular patent claims and prior-art record presented, the decision underscores several recurring themes in PTAB practice: precise claim construction, disciplined obviousness analysis, and careful attention to evidentiary support.

In a final written decision, the Board resolves whether the petitioner has shown, by a preponderance of the evidence, that the challenged claims are unpatentable.

The Patent Trial and Appeal Board’s Final Written Decision in IPR2025-00230 is a useful reminder of how decisively the Board will resolve validity disputes when the petitioner’s prior-art combinations, expert support, and claim construction positions align cleanly with the intrinsic record. In this June 11, 2026 decision, the PTAB concluded the inter partes review on the merits and determined the patentability of the challenged claims under the instituted grounds.

Although each final written decision turns on the particular technology and references at issue, the structure of the Board’s analysis here follows a familiar and important pattern for practitioners.