ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,452,603, issued on Oct. 21, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Double-sided sounding device" was invented by Long Zhang (Changzhou, China), Yu Qi (Changzhou, China) and Xiwen Du (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A double-sided sounding device is disclosed. The double-sided sounding device includes an upper vibration system and a lower vibration system. The upper vibration system includes an upper voice coil, and the lower vibration system includes a lower voice coil. The upper voice coil includes a first voice coil and a second voice coil respectively arranged on two opposite sides of t...