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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

Door-Check.

Description: Patent for a door check that holds the door at any point when it is swinging closed.
Date: July 18, 1911
Creator: Martin, Joseph M.
Partner: UNT Libraries Government Documents Department

Threshing-Machine

Description: Patent for a threshing machine "especially adapted for the cutting and threshing of small grain" (lines 15-16). Illustrations included.
Date: May 12, 1908
Creator: Haynes, Thomas Stanley
Partner: UNT Libraries Government Documents Department

Threshing-Machine.

Description: Patent for a harvester in a threshing machine, which can be put at different levels from the ground.
Date: August 31, 1909
Creator: Haynes, Thomas S.
Partner: UNT Libraries Government Documents Department