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Tool Joint.

Description: Patent for a new tool joint used in rotary drilling to connect the parts of a drill stem. The tool joint is not exclusive to drill stems and may be used in other applications.
Date: March 22, 1921
Creator: Kreiter, Richard F.
Partner: UNT Libraries Government Documents Department

Piston for Deep Well Pumps

Description: Patent for the development of a new and improved deep well pump used for the pumping of oil.
Date: February 22, 1921
Creator: Humason, Granville A.; Bashara, Sam F. & Barraco, Paul J.
Partner: UNT Libraries Government Documents Department
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