ALEXANDRIA, Va., June 19 -- United States Patent no. 12,335,709, issued on June 17, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Sound generator" was invented by Xuedong Lv (Shenzhen, China), Xiaoqiong Feng (Shenzhen, China), Kun Yang (Shenzhen, China), Zhen Huang (Shenzhen, China) and Yi Shao (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A sound generator provided in the present disclosure includes a frame, a magnetic circuit unit, and a first vibration unit and a second vibration unit arranged on two sides of the magnetic circuit unit. The magnetic circuit unit includes a first central magnetic yoke in the middle, a central magnet fixed to the first central magn...