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Nut Lock

Description: Patent for a nut lock. Illustration included.
Date: August 22, 1905
Creator: Marx, Ernest Max & Moses, Ealy J.
Partner: UNT Libraries Government Documents Department

Pumping Apparatus.

Description: Patent for pumping apparatus. This invention provides a means to elevate liquids by use of compressed air. It is specifically intended for deep oil-wells.
Date: August 25, 1903
Creator: Cain, Francis Charles & Herrenkind, Oscar Charles
Partner: UNT Libraries Government Documents Department

Pump-Valve Mechanism.

Description: Patent for a pump valve mechanism for use in deep wells, which can be easily removed for cleaning and repair,
Date: August 13, 1907
Creator: Sheen, Davis
Partner: UNT Libraries Government Documents Department
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