ALEXANDRIA, Va., March 31 -- United States Patent no. 12,589,787, issued on March 31, was assigned to MAGNUM TOOL CORP. INC. (Houston).
"Handcart" was invented by Livia Lin (Houston) and Brian Liu (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "One embodiment of the invention provides a cart comprising a frame with casters underneath and sockets located above the casters with longitudinal grooves for receiving and locating uprights formed from square tubing. The frame of the cart provides storage for unused tubing in a way that forms a load-bearing surface for the cart. In one embodiment two carts can be connected side by side by square tubing to accommodate large loads."
The patent was filed on Feb...