Heatrola
Was a trademark of Estate Stove Co. of Hamilton, OH. The company was bought by NOMA in 1945, then by RCA in 1952. RCA Estate then merged with Whirlpool, Sears, and Seeger Refrigerator Co. in 1955, and became Whirlpool-Seeger, now known as Whirlpool Corp. As a result, Whirlpool got the rights to use the RCA trademark on appliances until the mid 60's.