1964Clinton Rule invented an improved bilge pump, which flooded the marine market.Economy and Industry, Maritime & Fishing Industry, Technology
Rule filed the patent in April of 1964. By 1970, his business, Rule Industries, was big enough to expand into space at the Cape Ann Industrial Park.
Clinton, Rule. Pumps for liquids. US3256828A, issued June 21, 1966. https://patents.google.com/patent/US3256828A/en.