ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,697,730, issued on Aug. 4, was assigned to CHINA SOUTHERN POWER GRID TECHNOLOGY Co. LTD. (Guangzhou, China).

"Zero calibration method and related device for robotic arm control" was invented by Yang Wang (Guangzhou, China), Hui Wu (Guangzhou, China), Xiaoming Mai (Guangzhou, China), Xiaoye Zhang (Guangzhou, China), Peixin Li (Guangzhou, China), Guoying Lin (Guangzhou, China), Hao Wu (Guangzhou, China), Jinghui Song (Guangzhou, China), Qi Zeng (Guangzhou, China), Ximeng Zhu (Guangzhou, China), Qijiang Su (Guangzhou, China), Junjie Guo (Guangzhou, China), Ziyang Li (Guangzhou, China) and Jin Tan (Guangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Offic...