ALEXANDRIA, Va., Aug. 18 -- United States Patent no. 12,709,344, issued on Aug. 18, was assigned to GOERTEK INC. (Weifang, China).

"Counterweight structure, robot and method for controlling robot" was invented by Xing Zhang (Weifang, China), Chengkai Guo (Weifang, China) and Yuanjing Zheng (Weifang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a counterweight structure, a robot and a method for controlling the robot. The counterweight structure includes an electromagnetic device, a counterweight block and a reset piece. The reset piece is clamped between the electromagnetic device and the counterweight block. The electromagnetic device is magnetic after being powered on, to attract the ...