The Federal Circuit reconfirmed its interpretation of the IPR joinder rules of 35 U.S.C. § 315(c) after the panel’s rehearing in Facebook, Inc. v. Windy City Innovations, LLC, No. 2018-1400, 2020 WL 5267975 (Fed. Cir. Sept. 4, 2020). Appellant Facebook, Inc. had filed a combined request for panel rehearing and rehearing en banc. The
