ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,813, issued on May 20, was assigned to TDK Corp. (Tokyo).

"Filter circuit and multilayered filter device" was invented by Shuhei Sawaguchi (Tokyo), Masahiro Tatematsu (Tokyo), Yuta Ashida (Tokyo), Tetsuzo Goto (Tokyo), Yoshinori Matsumaru (Tokyo), Shigemitsu Tomaki (Tokyo) and Longfei Yi (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A filter circuit includes a pair of balanced input ports, a pair of balanced output ports, and first and second resonators provided in parallel between the pair of balanced input ports and the pair of balanced output ports in a circuit configuration, the first and second resonators being magnetically coupled to e...