ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,542,537, issued on Feb. 3, was assigned to MURATA MANUFACTURING Co. LTD. (Kyoto, Japan).
"Filter device and multiplexer" was invented by Toshiaki Takata (Nagaokakyo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A filter device includes at least one parallel arm resonator and series arm resonators including at least one first series arm resonator and at least one second series arm resonator being different from each other, a resonant frequency of the first series arm resonator is higher than a pass band of the filter device, the second series arm resonator has a series connection configuration in which at least two series arm resonators are connec...