ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,793, issued on April 7, was assigned to HITACHI INDUSTRIAL EQUIPMENT SYSTEMS Co. LTD. (Tokyo).
"Compressor" was invented by Akihiro Yamamoto (Tokyo), Yoshiyuki Kanemoto (Tokyo) and Zhijia Ren (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a compressor including a compressor unit that includes a compressor body that compresses gas and a motor that drives the compressor body, and a controller that carries out the operation number control for a plurality of the compressor units. The plurality of compressor units are connected to the same pipe. The controller causes, while continuing the operation number control for the compressor uni...