ALEXANDRIA, Va., April 21 -- United States Patent no. 12,610,179, issued on April 21, was assigned to AAC Kaitai Technologies (Wuhan) Co. LTD. (Wuhan, China).
"Speaker device" was invented by Qiang Dan (Wuhan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a speaker device having a support structure with a support body provided with a sound chamber and an annular sound hole. The speaker device further includes an ultrasonic sound emitting unit for emitting symmetrical ultrasonic waves, and a demodulation structure with a diaphragm and multiple fixed parts. The diaphragm is spaced apart from the sound hole. The ultrasonic waves emitted by the ultrasonic sound emitting unit...