ALEXANDRIA, Va., July 9 -- United States Patent no. 12,353,148, issued on July 8, was assigned to CANON K.K. (Tokyo).
"Image forming apparatus" was invented by Naonari Hashimura (Chiba, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An image forming apparatus includes a developing device including a developing roller, a supply roller, and a conductive roller. During image formation, a bias is applied to each of the supplying roller, the developing roller, and the conductive roller in a state in which each of the supplying roller, the developing roller, and the conductive roller is rotationally driven. During the image formation, a polarity of a first potential obtained by subtracting a DC potential of ...