ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,389,157, issued on Aug. 12, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Speaker box" was invented by Haijuan Yang (Changzhou, China) and Shuwen Wu (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure discloses a speaker box including a cover fixed between the frame and the magnetic circuit system; the cover includes a bottom wall set at a bottom of the speaker unit and a side wall extending from the bottom wall and set at a side of the speaker unit; the vibration system, the frame, the cover and the magnetic circuit system enclosing a internal space of the speaker unit; the cover is hot pres...