ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,402,727, issued on Sept. 2, was assigned to THREE STONE LLC (San Jose, Calif.).
"Multilayer blow molded board and its composition" was invented by Yixiang Jiang (Yuyao, China) and Jinglei Jiang (Yuyao, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A multilayer blow-molded board comprises an upper layer board and a lower layer board to form a hollow structure. Each of the layer boards comprises an outer layer and an inner layer. The present disclosure has the following advantages: the lower layer board is recessed upward so that the inner layers of the board and the upper layer board fuse with each other to form a supporting contact structure, res...