ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,553,534, issued on Feb. 17, was assigned to PURPOSE Co. LTD. (Fuji, Japan).

"Proportional solenoid valve control method, proportional solenoid valve system, proportional solenoid valve control device, valve opening degree control program, proportional solenoid valve, heat source device, heat source device control method, heat source device control program, recording medium, control device, and hot water supply device" was invented by Yoshiaki Sano (Fuji, Japan), Hiroyuki Yamada (Fuji, Japan) and Shinsuke Mochizuki (Fuji, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of controlling a proportional solenoid valve whose valve opening degree ...