ALEXANDRIA, Va., June 19 -- United States Patent no. 12,332,581, issued on June 17, was assigned to Oki Electric Industry Co. Ltd. (Tokyo).

"Image formation apparatus having developer cartridge with rotatable shutter lock engagement member" was invented by Shingo Shimada (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An image formation unit according to an embodiment may include: an image formation part with a developer reception port; a developer cartridge including: a developer storage section with a developer supply port; a shutter movable between an open position and a closed position; a lock engagement member; and an operation part configured to be operated to move the shutter and rotate the lock...