ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,401,108, issued on Aug. 26, was assigned to TDK Corp. (Tokyo).
"Filter circuit" was invented by Yuta Ashida (Tokyo), Masahiro Tatematsu (Tokyo), Shuhei Sawaguchi (Tokyo), Keigo Shibuya (Tokyo) and Tetsuzo Goto (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A filter circuit includes two ports, a first resonant circuit, and a second resonant circuit. The first resonant circuit is provided between the two ports in a circuit configuration and coupled with both of the two ports. The second resonant circuit is provided between the two ports in the circuit configuration and coupled with at least one of the two ports. Coupling of the second resonant circ...