Mealey's (December 15, 2022, 5:23 PM EST) -- WASHINGTON, D.C. — The Federal Circuit U.S. Court of Appeals properly found that inter partes review (IPR) estoppel precluded Apple Inc. and Broadcom Inc from challenging the validity of patent claims in an infringement lawsuit, California Institute of Technology (Caltech) argues to the U.S. Supreme Court in a brief opposing the companies’ petition for certiorari....