ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,402,768, issued on Sept. 2, was assigned to UBTECH ROBOTICS CORP LTD (Shenzhen, China) and BEST EPOCH TECHNOLOGY Co. LTD (Shenzhen, China).

"Recharge control method, robot and computer-readable storage medium" was invented by Gaobo Huang (Shenzhen, China), Hua Zhang (Shenzhen, China) and Xiangbin Huang (Shenzhen, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A recharge control method includes: providing a robot comprising a body and four infrared carrier receivers, wherein a second and a third of the four infrared carrier receivers are mounted on a front of the body, and a first and a fourth of four infrared carrier receivers are mounted on left ...