ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,452,601, issued on Oct. 21, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Speaker" was invented by Ke Li (Changzhou, China), Feng Zhang (Changzhou, China), Zhaoyu Yin (Changzhou, China) and Daxiang Ding (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure discloses a speaker comprising a frame, a vibration system, a magnetic circuit system, and a flexible circuit board embedded in the bottom end of the frame; the vibration system and the magnetic circuit system are respectively fixed at both ends of the frame and collectively enclosed into a sound producing cavity; the magnetic circuit system ...