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Annual report of the Commissioner of Patents for the year .. (1866)
United States. Patent Office · Washington : G.P.O · leaf 610
600 REPORT OF THE 56483— J. 0. Woodruff— Applying 56481— G. Williams — Elevator. Liquids to Casks.United States. Patent Office · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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