Visit Jones Day’s PTAB Litigation blog at www.ptablitigationblog.com.

By Carl Kukkonen –

On January 9, 2026, the USPTO designated a Director decision in IPR2025-00258 as precedential, offering guidance on when the Patent Trial and Appeal Board (PTAB) will exercise its discretion to deny institution of inter partes review (IPR) proceedings in instances of joinder. The…