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Description: Patent for an invention of a valve locking device by which the fuel supply pipe can be cut off and a valve which is inserted in the said pipe locked in the cut off position.
Date: July 15, 1919
Creator: Melton, William C.
Partner: UNT Libraries Government Documents Department

Pipe-Wrench.

Description: Patent for an economical pipe wrench that is easily adjustable using a pivoting, movable jaw to fit pipes of varying sizes.
Date: May 5, 1914
Creator: Adams, Benjamin F.
Partner: UNT Libraries Government Documents Department
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