ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,432,487, issued on Sept. 30, was assigned to BESTAR Holdings Co. Ltd. (Changzhou, China).
"Ultrasonic loudspeaker" was invented by Yonglei Zhang (Changzhou, China), Rufei Wang (Changzhou, China) and Yifei Wu (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to the technical field of electroacoustics, and in particular to an ultrasonic loudspeaker comprising: a magnetic circuit system for providing the loudspeaker with a magnetic field; a frame provided in a hollow way, the magnetic circuit system being fixed in the frame; an FPC lapped and fixed on the frame, a portion of the FPC in a hollow portion of the f...