ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,392,133, issued on Aug. 19, was assigned to YOSHINO GYPSUM Co. LTD. (Tokyo).
"Interior building materials" was invented by Itaru Yokoyama (Tokyo) and Ken Watanabe (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention intends to provide a technique by which, in an interior building material which is represented by a gypsum board and to which a magnet does not attach, the surface of such an interior building material can be modified so that a magnet can attach to the surface by simple means that can be put into practical use, a wall face and the like for which a stopper with a magnet, which is a substitute for a thumbtack, and a magn...