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Drilling-Machine

Description: Patent for a rotary drilling machine for drilling oil wells that has a stronger grip than previous drills.
Date: August 6, 1912
Creator: Black, Lee J.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Pipe-Clamp

Description: Patent for a pipe clamp to be used with well pipes and tubes. Illustrations included.
Date: October 22, 1912
Creator: Everett, Arthur D.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Drill

Description: Patent for a drill used for rotary drilling. Illustrations included.
Date: November 19, 1912
Creator: Sullivan, James C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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