ALEXANDRIA, Va., June 19 -- United States Patent no. 12,335,707, issued on June 17, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Double-sided speaker device" was invented by Xudong Yan (Changzhou, China), Tao Shao (Changzhou, China) and Xiaojiang Gu (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A double-sided sound device includes a frame, a first vibration system, a second vibration system, and a magnetic circuit system. The frame includes an upper end opening and a lower end opening, the first vibration system is disposed at the upper end opening of the frame, the second vibration system is disposed at the lower end opening of the frame, and the magnetic circui...