The âthen and nowâ of PTAB 24-02-2021 17-11-2020 After the US Patent Trial and Appeal Board (PTAB) was first formed in 2012, it soon gained a reputation as the ‘patent killer’ for knocking out patents via inter partes review (IPR). Now, nearly a decade later, a WIPR Patents Live panel discussed how the board has changed and what patent practitioners may expect to see in future. WIPR’s group publisher Peter Scott sat down with Oblon partners Lisa Mandrusiak and Christopher Ricciuti and Finnegan partner Trenton Ward to discuss, in particular, last year’s key developments and how these should influence an IPR filing.