The Waterman outboard engine appears to be the first gasoline-powered outboard offered for sale in significant numbers.[11] Developed by Cameron Waterman,[12] a young Yale Engineering student, it was developed from 1903, with a patent application filed in 1905[13] Starting in 1906,[14][15] the company went on to make thousands of his "Porto-Motor"[16] units,[17] claiming 25,000 sales by 1914.[18] The inboard boat motor firm of Caille Motor Company of Detroit were instrumental in making the cylinder and engines.