ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,439,823, issued on Oct. 7, was assigned to MURATA MANUFACTURING Co. LTD. (Kyoto, Japan).

"Piezoelectric device" was invented by Yutaka Kishimoto (Nagaokakyo, Japan) and Shinsuke Ikeuchi (Nagaokakyo, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "In a piezoelectric device, a layered portion includes, at a position at least above a recess, a single crystal piezoelectric layer and a pair of electrode layers to apply voltage to the single crystal piezoelectric layer. At least a portion of the pair of electrode layers includes a lower electrode layer extending along a surface of the single crystal piezoelectric layer, the surface being closer to a base....