The doctrine of issue preclusion, or collateral estoppel, prevents a party who unsuccessfully litigated an issue to a final decision in one proceeding from relitigating the same issue in future ...

Inter partes review—or “IPR”—has become a popular avenue for accused patent infringers to challenge the validity of a patent’s claims outside of federal court. Any interested party may file for IPR, ...

Lawyers familiar with US rules on patent invalidation may find some familiar parallels, and some key differences, in the Japanese system. Yoshinari Kishimoto of Sughrue Mion provides a comparative ...

“Although for now this decision has opened the doors of state courts to claims of industrial design (and patent) invalidity, there is a chance the court might restrict the scope of this interpretation ...

The U.S. Supreme Court in May issued its decision in Commil USA v. Cisco Systems, which rejected the argument that a good-faith belief in the invalidity of a patent could serve as a defense to an ...