ALEXANDRIA, Va., July 14 -- United States Patent no. 12,680,280, issued on July 14, was assigned to GRUNDFOS HOLDING A/S (Bjerringbro, Denmark).

"Circulation pump, system and method for domestic hot-water recirculation" was invented by Ole Bech-Lisberg (Bjerringbro, Denmark), Mathias Skodt Larsen (Bjerringbro, Denmark) and Jesper Vorgod Laursen (Bjerringbro, Denmark).

According to the abstract* released by the U.S. Patent & Trademark Office: "A circulation pump for supplying hot water to a hot water inlet of a temperature-controlled bypass valve for domestic hot-water recirculation, the circulation pump including a pump controller configured for controlling a pump motor such that the pump motor cycles between on-phases and off-phases, the...