ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,722,389, issued on Sept. 1, was assigned to Canon K.K. (Tokyo).

"Printing apparatus and control method" was invented by Jun Yasutani (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "There are provided a circulation path which can supply printing material to a printing element board having nozzle capable of ejecting printing material and collect printing material not ejected from the printing element board, an acquisition unit which acquires information on concentration of printing material circulating through the circulation path, and a discharge control unit which executes discharge control of printing material concentration in which pri...