ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,484,773, issued on Dec. 2.
"Cheek retractor" was invented by Kotaro Kubo (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "There is obtained a cheek retractor that a right outer flange and a left outer flange are provided with a right personal authentication identification code plate portion and a left personal authentication identification code plate portion, respectively, on which two-dimensional barcodes are printed. Since the cheek retractor is mounted on an oral cavity of a patient by holding an arm, which is close to the right personal authentication identification code plate portion and the left personal authentication identification code plat...