ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,552,431, issued on Feb. 17, was assigned to Wuyi Shanqiu Leisure Products Co. Ltd. (Jinhua, China).
"Separable liftable double-deck wagon" was invented by Chenfei Qiao (Jinhua, China) and Jianqiu Hu (Jinhua, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A separable liftable double-deck wagon includes two front main rods and two rear main rods, top fixing members are fixed to tops of the front and rear main rods, and bottom fixing members are fixed to bottoms of the front and rear main rods. The front and rear main rods are sequentially provided with fixed connecting members and slidable connecting members from top to bottom. A front-rear folding ...