ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,990, issued on Dec. 2, was assigned to LEMA Inc. (St. Paul, Minn.).

"Solar heating for refrigeration and fluid heating devices" was invented by Brian Plourde (St. Paul, Minn.), Andrew Gikling (St. Paul, Minn.), John Abraham (Minneapolis), Richard Pakonen (Birchwood, Minn.) and Douglas Plourde (Somerset, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A fluid-based system for use in heating and/or cooling. In particular, the system may have a fluid heating device, which may be a solar fluid heating device, configured to heat a fluid. Heat from the heated fluid may be transferred to one or more cooling subsystems or heating subsystems. A cooling su...