ALEXANDRIA, Va., March 5 -- United States Patent no. 12,240,312, issued on March 4, was assigned to NIPPON STEEL Corp. (Tokyo).
"Tray and tray manufacturing method" was invented by Hiromi Asama (Tokyo) and Junichiro Suzuki (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A tray (20) including a bottom wall (21) and a peripheral side wall (22) erected from an outer periphery of the bottom wall (21) includes a high-strength portion HT having a high tensile strength; and a low-strength portion LT having a tensile strength lower than that of the high-strength portion HT. The low-strength portion LT includes a recessed portion (C) having a corner portion (22C) in a first side wall inner surface (221a) and a ...