What American manufacturer of heating and cooling appliances purchased the rights in 1925 to be the only refrigerator manufacutrer in America?
Baltzar von Platen (inventor):  Servel purchased rights to manufacture the refrigerator in 1925 and was the only U.S. manufacturer for many years. Servel: Servel was an American manufacturer of heating and cooling appliances, founded in 1922.
Servel