Mealey's (August 12, 2022, 12:26 PM EDT) -- WASHINGTON, D.C. — Even under new limitations on assignor estoppel recently established by the U.S Supreme Court, an infringement defendant is estopped from challenging the validity of an endometrial ablation patent because claim 1 of the patent is not “materially broader” than the claims that were assigned, the Federal Circuit U.S. Court of Appeals ruled Aug. 11....