ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,491,131, issued on Dec. 9, was assigned to Saunum Group AS (Tallinn, Estonia).
"Sauna heating apparatus and method of heating sauna sweat room" was invented by Andrus Vare (Tallinn, Estonia), Ardi Lippur (Kaina, Estonia), Meelis Unt (Tallinn, Estonia) and Rannar Parn (Tartu, Estonia).
According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus, method and computer program of heating a sauna sweat room for providing a comfortable temperature and environment in the sauna sweat room for a pleasant sauna experience. The apparatus includes a heating unit comprising a heat accumulator and a duct for collecting a hot air and a cool air and enabling the mix of the...