ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,447,755, issued on Oct. 21, was assigned to SEIKO EPSON Corp. (Japan).

"Three-dimensional object printing apparatus and three-dimensional object printing method" was invented by Yoshinori Nakajima (Matsumoto, Japan), Kohei Utsunomiya (Matsumoto, Japan), Masaru Kumagai (Shiojiri, Japan) and Yuki Ishii (Shiojiri, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A three-dimensional object printing apparatus executes a first printing operation in which a liquid is ejected into a first band region and a second printing operation in which the liquid is ejected into a second band region. When an angle formed by a vector at a first position in a first path ...