ALEXANDRIA, Va., June 16 -- United States Patent no. 12,309,539, issued on May 20, was assigned to Huawei Technologies Co. Ltd. (Shenzhen, China).
"Terminal protective case and audio playback system" was invented by Junqing Luo (Shanghai), Jie Su (Shenzhen, China), Ligang Yu (Shenzhen, China), Fanfan Liu (Shanghai), Jing Chang (Shanghai), Shizhe Li (Shanghai) and Senjun Chen (Shanghai).
According to the abstract* released by the U.S. Patent & Trademark Office: "A terminal protective case and an audio playback system, the case including a housing, a diaphragm, a piezoelectric sheet, and a drive circuit. The housing has a main body part and a fastening frame part, a side of the fastening frame part is fastened to a periphery of the main bod...