 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 to the use of coupled inductors in voltage converters. 