ALEXANDRIA, Va., June 18 -- United States Patent no. 12,325,234, issued on June 10, was assigned to Kyocera Document Solutions Inc. (Japan).
"Image forming apparatus" was invented by Jun Nakano (Osaka, Japan), Hiroomi Nakatsuji (Osaka, Japan), Masato Usui (Osaka, Japan) and Naoko Kawashima (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ink-ejection-malfunction-nozzle detecting unit sets nozzle groups such that each nozzle group includes nozzles with a first interval, prints a first test pattern that includes first bands (including thin lines) corresponding to the nozzle groups, sets nozzle subgroups such that each nozzle subgroup includes nozzles with a second interval in each of the nozzle ...