ALEXANDRIA, Va., May 19 -- United States Patent no. 12,634,610, issued on May 19, was assigned to AAG Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Speaker box" was invented by Pinsong Chen (Changzhou, China) and Li Ren (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure discloses a speaker box including a housing having a receiving space and a speaker unit received in the receiving space. The housing and the speaker unit encloses a front cavity and a rear cavity isolated from each other. A mesh disposed in the rear cavity is configured to enclose a filling chamber with the bottom cover for filling sound-absorbing particles. A steel sheet of the bottom cover includes...