Companion was a brand name for less expensive tools and machines from Sears, Roebuck & Co. The Companion name was replaced by Dunlap on 1941 model machines (starting in late 1940).
Makers of Companion woodworking machines include Walker-Turner Co., Inc. and Central Specialty (later a division of King-Seeley Corp.). See the Craftsman entry for more history and a list of manufacturers codes.