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Pipe-Wrench.

Description: Patent for the improvement of pipe wrenches necessary for use in well drilling or other circumstances where a wrench of strong construction is needed. This patent provides for a pipe wrench that can be easily adjusted to fit pipes of differing sizes and is easily manipulated for use regardless of direction.
Date: December 9, 1919
Creator: Carmichael, Robert E.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Device for Unscrewing and Withdrawing Pipe

Description: Patent for "an improvement in devices for unscrewing and withdrawing pipe or casing from wells, mines, etc. or for other similar uses" (lines 11-14) including instructions and illustrations.
Date: December 9, 1919
Creator: Fletcher, Harold W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Patent for Diver's Mask

Description: Patent for Diver's Mask that has a water-tight contact with the wearer's face. This mask allows for an inlet and outlet for air and eliminates the need for an ordinary diver's helmet and suit.
Date: December 9, 1919
Creator: Runyan, Benjamin F.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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