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Pumping Jack
Patent for pumping jacks relating to oil wells.
Date:
January 2, 1917
Creator:
McCuin, William H.
System:
The Portal to Texas History
Plow.
Patent for a new type of wing plow with new improvements designed to prevent earth from being thrown onto previous plants.
Date:
March 13, 1917
Creator:
Moore, William F.
System:
The Portal to Texas History