ALEXANDRIA, Va., July 30 -- United States Patent no. 12,370,811, issued on July 29, was assigned to Canon K.K. (Tokyo).
"Printing apparatus and control method thereof" was invented by Kazuhiro Watanabe (Tokyo), Keita Takatani (Yokohama, Japan) and Takeshi Nakata (Kawasaki, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A printing apparatus includes at least a tank configured to hold a first printing material at a first position and a tank configured to hold a second printing material at a second position different from the first position. A light emitting control unit controls light emitting states of a plurality of light emitters. If an amount of the printing material in the first tank is less than a ...