ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,443, issued on March 31, was assigned to Kubota Corp. (Osaka, Japan).

"Working machine" was invented by Kazuyuki Hatta (Osaka, Japan) and Hiroshi Horii (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A working machine includes a machine body, a boom including a proximal end swingably coupled to the machine body, an arm coupled to a distal end of the boom swingably in arm-crowd and arm-dump directions, a working lamp on the boom, and an illumination controller to control the working lamp. The working lamp includes first and second light sources. The optical axis of the first light source is oriented more to the distal end of the boom th...