ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,379,149, issued on Aug. 5, was assigned to PHC HOLDINGS Corp. (Tokyo).
"Cold storage" was invented by Mitsuyuki Shirata (Ehime, Japan) and Naoki Yanagihara (Gunma, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cold storage includes a box with a cold storage chamber, a compressor constituting a refrigeration circuit that cools the inside of the cold storage chamber, a defrost heater that heats an evaporator constituting the refrigeration circuit, and a control apparatus that controls the compressor and the defrost heater. The control apparatus operates the defrost heater when the compressor is not operated. When an outside air temperature is equa...