ALEXANDRIA, Va., June 17 -- United States Patent no. 12,315,687, issued on May 27, was assigned to Huawei Digital Power Technologies Co. Ltd. (Shenzhen, China) and Shanghai Liangxin Electrical Co. Ltd. (Shanghai).

"Rotary switch" was invented by Xiufeng Zhang (Dongguan, China), Jian Shi (Shanghai), Hao Wang (Shanghai), Jiang Zhang (Shanghai) and Xiaokang Tian (Shenzhen, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A rotary switch includes an operating mechanism, an on-off apparatus, and a tripping component. The operating mechanism includes an energy storage component and a drive component. The drive component is in driving connection with the energy storage component and the on-off apparatus. The en...