ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,736,898, issued on Sept. 15, was assigned to Canon K.K. (Tokyo).

"Determination method and recovery method" was invented by Toshihiko Takayama (Kanagawa, Japan), Yuichiro Hirata (Shizuoka, Japan) and Shuichi Tetsuno (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A determination method includes outputting a pattern image including a first region where a halftone image is formed and a second region where another halftone image is formed, the halftone image of the second region being constituted by dots of an average dot size smaller than an average dot size of dots constituting the halftone image of the first region, comparing a density ...