ALEXANDRIA, Va., July 3 -- United States Patent no. 12,348,218, issued on July 1, was assigned to MURATA MANUFACTURING Co. LTD. (Kyoto, Japan).
"Acoustic wave filter" was invented by Ryosuke Nakahata (Nagaokakyo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An acoustic wave filter includes a first longitudinally coupled resonator including first and second IDT electrodes, and a second longitudinally coupled resonator including third and fourth IDT electrodes. Each IDT electrode includes a wide pitch electrode finger group and a narrow pitch electrode finger group. A number of electrode fingers in the wide pitch electrode finger group of the first IDT electrode is smaller than that in the wide pitch e...