ALEXANDRIA, Va., May 5 -- United States Patent no. 12,617,479, issued on May 5, was assigned to Kubota Corp. (Osaka, Japan).

"Work vehicle" was invented by Minoru Hiraoka (Sakai, Japan), Tomoyoshi Sakano (Sakai, Japan) and Junichi Ishikawa (Sakai, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A work vehicle includes a body 1; a plurality of travel wheels 2 at front and back portions of the body 1 on each of left and right sides; a plurality of holder mechanisms A held by the body 1 and holding the respective travel wheels 2 in such a manner as to be capable of moving the travel wheels 2 independently of one another relative to the body 1; and a plurality of crawler travel devices E attachable to and d...