ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,431,864, issued on Sept. 30, was assigned to MURATA MANUFACTURING Co. LTD. (Nagaokakyo, Japan).
"Acoustic wave filter" was invented by Hirotsugu Mori (Nagaokakyo, Japan) and Syunsuke Kido (Nagaokakyo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An acoustic wave filter includes a first ladder circuit including a first series arm resonator and a first parallel arm resonator, a second ladder circuit including a second series arm resonator and a second parallel arm resonator, and a third ladder circuit including a third series arm resonator and a third parallel arm resonator. The first, second and third ladder circuits are cascade-connected in ord...