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Propeller.

Description: Patent for improvements for a propeller that can be attached to a boat, and do everything it can to work the way a fish's tail does.
Date: May 26, 1914
Creator: Stribling, John L.
Partner: UNT Libraries Government Documents Department

Form For Concrete Vessels

Description: Patent for large, concrete vessels, meant as a mold to "be used again and again in building different vessels" (lines 17-18).
Date: November 5, 1918
Creator: Kroeger, Otto P.
Partner: UNT Libraries Government Documents Department
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