ALEXANDRIA, Va., April 2 -- United States Patent no. 12,264,064, issued on April 1, was assigned to AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) Co. LTD. (Shenzhen, China).

"Microelectromechanical system" was invented by Scott Lyall Cargill (Eb, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A microelectromechanical system includes a backplate and a diaphragm. The backplate includes spaced stator elements with voids formed therebetween. The stator element includes a first conductive element. The diaphragm includes a plurality of corrugations facing the voids respectively. Each corrugation includes a groove formed at a surface thereof away from the backplate. The corrugation includes a second conductive...