ALEXANDRIA, Va., July 21 -- United States Patent no. 12,685,419, issued on July 21, was assigned to Qfeeltech (Beijing) Co. Ltd. (Beijing).
"Recharging method for cleaning robot and cleaning robot system" was invented by Zhanglin Liu (Beijing) and Wulin Tian (Beijing).
According to the abstract* released by the U.S. Patent & Trademark Office: "A recharging method for a cleaning robot is provided. The recharging method includes: determining a direction of a charging base; controlling the cleaning robot to move in a first direction toward the direction of the charging base; detecting, in real time, a distance between the cleaning robot and the charging base; determining whether the cleaning robot has arrived at a target location based on th...