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Pipe-Grapple.

Description: Patent for an improved pipe gripping mechanism which engages the interior of a pipe or tube.
Date: June 30, 1914
Creator: Martin, John E.
Partner: UNT Libraries Government Documents Department

Holder for Poison.

Description: Patent for poison holders which the poison can be freely distributed without accidental disastrous result. The poison inside the holder can be saved for future use. Illustration is included.
Date: September 8, 1903
Creator: Shelton, William J.
Partner: UNT Libraries Government Documents Department