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Pipe-Wrench

Description: Patent for a pipe wrench with adjustable jaws.
Date: December 31, 1912
Creator: Brightwell, Walter J.
Partner: UNT Libraries Government Documents Department

Automatic Safety Attachment for Air-Brakes

Description: Patent for an automatic safety attachment for air brakes that can be attached to trains and automobiles. Illustrations included.
Date: April 11, 1911
Creator: Hamilton, Ernest Hubbard
Partner: UNT Libraries Government Documents Department

Gas-Exploded Ordnance

Description: Patent for a gas gun. Illustrations included.
Date: May 30, 1911
Creator: Hamilton, Ernest Hubbard
Partner: UNT Libraries Government Documents Department

Colter.

Description: Patent for the instructions on of how to construct a Colter including illustrations.
Date: April 25, 1916
Creator: Elder, James Zedrick
Partner: UNT Libraries Government Documents Department
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