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Card Holder

Description: Patent for card holders meant to help better display business cards and other forms of advertisement on surfaces such as windows.
Date: March 4, 1919
Creator: Hill, L. W.
Partner: UNT Libraries Government Documents Department

Drill-Collar.

Description: Patent for a new design for collars to be used on water-flushed rotary drills, including instructions and illustrations.
Date: March 16, 1915
Creator: Myers, George S.
Partner: UNT Libraries Government Documents Department

Pipe-Tongs

Description: Patent for an improvement on the existing design of pipe tongs, the improvement will allow for one individual to hold the tongs, adjust the size around the pipes, and screw or unscrew the pipe alone. Previous designs required two or three individuals.
Date: March 9, 1920
Creator: Hill, Richard Dennie
Partner: UNT Libraries Government Documents Department

Pump

Description: This patent is for pumps. This patent allows for the pump barrel to be readily disengaged from its normal positive engagement with the well tube for removal from said tube for repairs or any other reason.
Date: March 19, 1918
Creator: Perry, Sherman V.
Partner: UNT Libraries Government Documents Department
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