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Pipe-Clamp

Description: Patent for a pipe clamp for lifting and placing pipes and drill rods into and out of wells. Illustrations included.
Date: March 29, 1910
Creator: Rountree, Joseph G.
Partner: UNT Libraries Government Documents Department

Bolt-Jack

Description: Patent for a bolt jack with which bolts may be pulled without bending. Illustrations included.
Date: March 29, 1910
Creator: Smith, Henry H.
Partner: UNT Libraries Government Documents Department

Improved Double Pincers.

Description: Patent for the improvement of double pincers by way of "double jaws, by which both sides of the shanks of a boot of shoe can be clamped and held at the same time."
Date: March 29, 1870
Creator: Maund, William
Partner: UNT Libraries Government Documents Department