ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,753,751, issued on Oct. 6, was assigned to HITACHI INDUSTRIAL EQUIPMENT SYSTEMS Co. LTD. (Tokyo).
"Compressor" was invented by Nobuyuki Narisawa (Tokyo) and Ken Umeda (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A compressor includes a compressor body, a motor, a current sensor that detects a current value of the motor, and a control device that controls the drive of the motor. The control device determines, through the current sensor, a current value of the motor at a point in time when a first time has elapsed from the start of the motor. The control device further determines a current value of the motor at a point in time when a second time, ...