ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,532,122, issued on Jan. 20, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Speaker device" was invented by Zhang Ren (Changzhou, China) and Zhiwei Zhong (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a speaker device, including a first frame, a first vibration system, a magnetic circuit system, a second frame, a second vibration system, a second voice coil, and a conductive member. The magnetic circuit system includes a lower splint, a first main magnetic steel, a first sub-magnet steel, a first pole core, a second sub-magnetic steel, and an upper splint. The conductive member includes an external c...