ALEXANDRIA, Va., July 30 -- United States Patent no. 12,371,914, issued on July 29.
"One-way retractable building formwork apparatus" was invented by Chien-Ho Wang (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A one-way retractable building formwork apparatus for mounting on a mounting surface of a substrate module includes a first side bar disposed on one end of the mounting surface that extends along a lateral direction, a second side bar disposed on another end of the mounting surface and opposite to the first side bar along an extending direction transverse to the lateral direction, and a retractable unit that is disposed on the mounting surface, that is connected to the first side bar...