ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,479,707, issued on Nov. 25, was assigned to KING TREE HANDICRAFTS (SHENZHEN) Co. LTD. (Shenzhen, China).
"Christmas tree built-in lifting device" was invented by Xiaopeng Hao (Tianjin, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The application provides a Christmas tree built-in lifting device comprising a base, a lifting device fixed on the base. The lifting device comprises an outer tube, an inner tube, a motor, a chain, a coupling, a transmission gear, a chain fixing plate, a driven gear. The Christmas tree lifting device is configured as a built-in chain lifting device, and the motor drives the chain to rotate and then drives the inner tube...