ALEXANDRIA, Va., July 16 -- United States Patent no. 12,360,491, issued on July 15, was assigned to BROTHER KOGYO K.K. (Aichi, Japan).

"Drum cartridge and developing cartridge capable of suppressing variation in position of electrical contact surface" was invented by Takashi Shimizu (Nagoya, Japan) and Koji Abe (Nagoya, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A drum cartridge includes: a drum frame to which a developing cartridge including a storage medium having an electrical contact surface is detachably attachable; a photosensitive drum; a transfer roller; and a conveying roller. The drum is rotatable about a first axis extending in a first direction and positioned at one end portion of the f...