ALEXANDRIA, Va., June 12 -- United States Patent no. 12,300,044, issued on May 13, was assigned to Kubota Corp. (Osaka, Japan).

"Management system for working machine" was invented by Keisuke Miura (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An operation system of a working machine mounted on the working machine, including a first control device to control the working machine, and a first command device to output a command to the first control device wirelessly, the command relating to control of the first control device. The first command device includes a first obtaining part to obtain an expiration date of the working machine from outside, a first time calculating part to obtain time, a t...