To embed, copy and paste the code into your website or blog: A weekly summary of the precedential patent-related opinions issued by the Court of Appeals for the Federal Circuit and the opinions designated precedential or informative by the Patent Trial and Appeal Board. Wi-LAN Inc. v. Sharp Electronics Corp., et al. , Nos. 2020-1041, -1043 (Fed. Cir. (D. Del.) Apr. 6, 2021). Opinion by Dyk, joined by Taranto and Stoll. Wi-LAN sued Sharp and Vizio for infringement of two patents relating to video deinterlacing and multimedia encoders, respectively. Regarding the first patent, the district court awarded the defendants summary judgment of noninfringement because Wi-LAN lacked sufficient admissible evidence to prove infringement. The district court found that, to demonstrate infringement, Wi-LAN would need to rely on source code for the accused systems. Wi-LAN thus supplied source code printouts obtained via litigation against third-party chip manufacturers, together with declarations from employees of those manufacturers purporting to authenticate the printouts. The district court found the printouts to be inadmissible, and thus held that Wi-LAN could not meet its evidentiary burden.