ALEXANDRIA, Va., June 19 -- United States Patent no. 12,335,713, issued on June 17, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Speaker" was invented by Long Zhang (Changzhou, China) and Jiasheng Zhou (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a speaker including a first frame, a second frame, a first vibration system, a second vibration system, and a magnetic circuit system. The first vibration system includes a first diaphragm and a pair of first voice coils. The second vibration system includes a second diaphragm and a pair of second voice coils. The pair of first voice coils is arranged spaced apart from each other in a firs...