ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,722,397, issued on Sept. 1, was assigned to Kyocera Document Solutions Inc. (Japan).

"Image forming apparatus" was invented by Masato Usui (Osaka, Japan), Jun Nakano (Osaka, Japan), Hiroomi Nakatsuji (Osaka, Japan) and Naoko Kawashima (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A control unit causes a recording head to eject ink from nozzles corresponding to an image to be printed. An ejection malfunction nozzle detecting unit causes the recording head to print a test pattern, and detects an ejection malfunction nozzle on the basis of a scanned image of the test pattern. The test pattern includes plural test pattern images such that in ...