ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,489,422, issued on Dec. 2, was assigned to MURATA MANUFACTURING Co. LTD. (Kyoto, Japan).
"Filter device" was invented by Yoshinori Kameoka (Nagaokakyo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A filter device includes a first path, a second path, and a capacitor. The first path includes at least one ladder filter circuit and connects a first terminal and a second terminal. The at least one ladder filter circuit includes a parallel arm resonator connected to a ground terminal. The second path includes a grounded resonator and is connected in parallel with any of the at least one ladder filter circuit. One end of the capacitor is connected to t...