ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,453,289, issued on Oct. 21, was assigned to KYOCERA Corp. (Kyoto, Japan).
"Piezoelectric actuator" was invented by Satoshi Takeuchi (Kawasaki, Japan) and Kazuki Tanaka (Kirishima, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A piezoelectric actuator includes a piezoelectric element having a longitudinal direction, a case including a lid portion, a bottom portion, and a tubular portion and housing the piezoelectric element inside, and a strain gauge positioned at the tubular portion. The tubular portion includes a plurality of bent portions in the longitudinal direction, each of the plurality of bent portions bending in response to extension and ...