ALEXANDRIA, Va., July 9 -- United States Patent no. 12,351,226, issued on July 8.
"Transfer trolley and outdoor transfer device" was invented by Yuwen Chen (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A transfer trolley and an outdoor transfer device are disclosed. The transfer trolley includes a frame, casters, a drag rod, and constraint components. The frame has a structure of being folded or unfolded in a width direction, the casters are two pairs and fixed to bottom of the frame. One end of the drag rod being rotary fixed to one end in a length direction of the frame, and the other end of the drag rod being flipped upwardly or downwardly around the one end of the drag rod that is rota...