ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,554,214, issued on Feb. 17, was assigned to Canon K.K. (Tokyo).

"Developing cartridge having a sheet member provided at end portion of a developing roller" was invented by Takuya Kawakami (Mishima, Japan), Noriyuki Komatsu (Numazu, Japan), Tetsuya Numata (Suntou-gun, Japan), Naoya Asanuma (Susono, Japan) and Daisuke Makiguchi (Izunokuni, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cartridge detachably mountable to a main assembly of an image forming apparatus includes a photosensitive member unit including a photosensitive drum; a sheet configured to remove a deposited matter from a surface of the drum, the sheet being in contact with the sur...