ALEXANDRIA, Va., July 16 -- United States Patent no. 12,362,089, issued on July 15, was assigned to TDK Corp. (Tokyo).
"Common mode filter" was invented by Toshio Tomonari (Tokyo), Tsutomu Kobayashi (Tokyo) and Kazunori Arimitsu (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein is a common mode filter that comprises a drum core including a winding core portion and a pair of flange portions provided at both ends of the winding core portion, and first and second wires wound around the winding core portion so as to form a pair-wire for each turn. The first and second wires includes one or a plurality of sparsely-wound portions in which the first and second wires are wound with adjacent pair...