ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,480,281, issued on Nov. 25, was assigned to Hitachi Construction Machinery Co. Ltd. (Tokyo).
"Construction machine" was invented by Katsumasa Uji (Tsukuba, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A construction machine is provided which includes a plurality of hydraulic actuators, a hydraulic pump that discharges pressurized fluid for driving the hydraulic actuators, an engine that drives the hydraulic pump, a plurality of operation lever devices that operate the corresponding hydraulic actuators, a key switch that starts the engine, a speed sensor that senses a rotational speed of the engine, a plurality of operation sensors that sense ope...