ALEXANDRIA, Va., June 17 -- United States Patent no. 12,317,052, issued on May 27, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Speaker box" was invented by Bing Lu (Changzhou, China), Shuwen Wu (Changzhou, China) and Dijiang Tong (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A speaker box is provided and includes a housing defining a receiving space; and a speaker driver received in the receiving space. The speaker driver includes a basin frame, and a diaphragm and a magnetic circuit system. The speaker driver further includes a metal cover case fixed on the basin frame and the magnetic bowl. The metal cover case includes a bottom wall connected with the magneti...