US Patent Issued to AAC Microtech (Changzhou) on June 16 for "Speaker" (Chinese Inventors)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,659,648, issued on June 16, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).

"Speaker" was invented by Zhang Ren (Changzhou, China) and Zhiwei Zhong (Changzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A speaker includes a first frame, a first vibration system, a second frame, a second vibration, and a magnetic circuit system separately driving the first vibration system and the second vibration system to vibrate and sound, the magnetic circuit system includes a lower plate fixed on the first frame, a main magnet stacked and fixed on the lower plate, a main pole plate stacked and fixed on the main magnet, a center auxil...