ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,507,850, issued on Dec. 30, was assigned to Beijing Roborock Innovation Technology Co. Ltd. (Beijing).
"Cleaning robot" was invented by Zhenyu Liang (Beijing), Yanjun Liu (Beijing), Lizhi Xiang (Beijing) and Zhijun Li (Beijing).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cleaning robot, comprising: a robot body, a control unit provided in the robot body, and a fixing unit provided at the bottom of a front end of the robot body, the fixing unit comprising a sleeve and an ultrasonic sensor, the ultrasonic sensor being fixed in the sleeve and being electrically connected to the control unit, and the ultrasonic sensor being used for emitting an ultrason...