Estoppel Doctrine in China's Patent System
The Patent Trial and Appeal Board held all challenged claims of IGT’s patent unpatentable as obvious over two prior art patents. Zynga Inc. v. IGT, IPR2022-00199-32. In doing so, the PTAB further held that, contrary to...more
In This Issue: - After B&B Hardware, What is the Full Scope of Estoppel Arising From a PTAB Decision in District Court Litigation? - When You Don’t Know What You Know: The Role of Unappreciated Inherency in the...more