Index of hot air engine manufactures (pre 1940)

Australia Trewhella	Belgium . Dutry-Colson
Finland O Steinburg	France .
Germany Alfred Draeger Louis Heinrici Ernst Heinrici H Raab	Great Britain W. H. Bailey Brockway and Phillips Hayward-Tyler The Britania Company Hotpoint The Model Engineering Co. H. R. Robinson W T Sugg Norris and Henty Gardners
Holland D W van Renes	India Carl Jost
Switzerland E. Paillard & Cie	USA American Machine Co. Bremen manufacturing Co. Henry Essex W H Smith DeLamater Iron Works. Erwin Welsh Hydraulic Machinery Co. Fanning Manufacturing Co. Ideal Vacuum Motor Co Lake Breeze fan. Middlefiled Manufacturing Company. Metal Ware Corporation Remington Machine Co. Rider Engine Co. Rider Ericsson Engine Co. F F Slocomb Thermo Engine Co. Thomas Smith. Ticonderoga Machine Co. Kane's-Pennington1895.