ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,727,530, issued on Sept. 8, was assigned to PIXART IMAGING INC. (Hsin-Chu, Taiwan).

"Environment maintenance system and weeder robot" was invented by Yen-Min Chang (Hsin-Chu, Taiwan), Shih-Feng Chen (Hsin-Chu, Taiwan) and Han-Lin Chiang (Hsin-Chu, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A weeder robot includes a movable carrier and a blade module assembled to the movable carrier. The movable carrier includes a map creating module and a control module that is electrically coupled to the blade module and the map creating module. The map creating module includes an infrared unit and a vision sensing unit. The infrared unit can emit and receiv...