ALEXANDRIA, Va., June 18 -- United States Patent no. 12,326,683, issued on June 10, was assigned to RICOH COMPANY LTD. (Tokyo).

"Image forming apparatus and method to form an invisible image and a visible image in a multi-pass simplex manner" was invented by Yasuhiro Fujiwara (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An image forming apparatus includes an image forming device that forms an image on a recording medium and circuitry that controls the image forming device. The image forming device forms an invisible image with an invisible material on the recording medium and forms a visible image with a visible material on the invisible image. Each of first and second adhesion amounts inc...