US Patent Office Rejects Monolithic Power Systems' Challenges to Volterra Coupled Inductor Patents PR Newswire SAN JOSE, Calif., March 24, 2021 SAN JOSE, Calif. , March 24, 2021 /PRNewswire/ -- Volterra Semiconductor LLC, a wholly owned subsidiary of Maxim Integrated Products, Inc. (NASDAQ: MXIM), today announced that the United States Patent and Trademark Office (USPTO) rejected five petitions by Monolithic Power Systems, Inc. (MPS) seeking Inter Partes Review on three Volterra patents relating...