ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,538,902, issued on Feb. 3, was assigned to Xiamen Hedeman Electronic Technology Co. Ltd. (Xaimen, China).
"Chicken coop door" was invented by Zhijie Qiu (Xiamen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A chicken coop door includes a door body, a connecting component, and a driving device. One end of the door body is connected to the pivot of the driving device through the connecting component, with the other end serving as the movable end. The rotation of the pivot propels the connecting component and door body to rotate. During the closing process, the connecting component guide the downward movement of the door body after rotation. The chi...