ALEXANDRIA, Va., July 14 -- United States Patent no. 12,679,434, issued on July 14, was assigned to Jinhua Mutao Leisure Products Co. Ltd. (Jinhua, China).
"Double-decker wagon" was invented by Xiangshan Zhang (Suzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A double-decker wagon is provided. The double-decker wagon includes four spaced rectangular standing posts, four side folding mechanisms each sequentially hinged between two adjacent standing posts, an upper bottom support mechanism, and a lower bottom support mechanism, where the standing posts each are provided with a first fixing member, a second fixing member, and a third fixing member in sequence from top to bottom; a sliding sleeve is ...