ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,416,953, issued on Sept. 16, was assigned to Chemtron Research LLC (Wilmington, Del.).

"Energy conserving (stand-by mode) power saving design for battery chargers and power supplies with a control signal" was invented by Harry Leonard Perper (North Potomac, Md.) and James Randall Beckers (Rockville, Md.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system is described that turns off a high power, power supply when a device no longer needs high power. A low power, power supply or a rechargeable battery provides power to determine when the device again needs high power. The low power supply consumes a minimum possible power when the device does not ne...