Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. v. Sirius XM Radio Inc., No. 2023-2267 (Fed. Cir. (D. Del.) June 9, 2025). Opinion by Lourie, joined by Dyk and Reyna....more
Assignor estoppel is an equitable doctrine that prevents a party who assigns a patent to another from later challenging the validity of the assigned patent. As reported in a prior post, the Federal Circuit recently stated...more