ALEXANDRIA, Va., March 19 -- United States Patent no. 12,255,604, issued on March 18, was assigned to TAIYO YUDEN Co. LTD. (Tokyo).
"Acoustic wave device and filter" was invented by Mamoru Ishida (Tokyo) and Takashi Matsuda (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An acoustic wave device includes a piezoelectric layer, the piezoelectric layer being a rotated Y-cut lithium niobate substrate or an X-cut lithium tantalate substrate; an upper conductive layer having a substantially consistent density, on or over the upper surface of the piezoelectric layer; a lower conductive layer having a substantially consistent density, on or below the lower surface of the piezoelectric layer; and a first additi...