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Wrench for Rotary Well-Drills.

Description: Patent for a wrench designed to assist in working with rotary well drills. The wrench is adapted for unscrewing the coupling that attaches a drill point to a pipe section, as well as for detaching the pipe sections from one another. The advantage of the wrench is in allowing convenient detachment of the parts of a well drill quickly and efficiently.
Date: October 21, 1913
Creator: Lebus, George Franklin
Partner: UNT Libraries Government Documents Department

Measure for Oil-Wells.

Description: Patent for a device measuring the depth of oil and other wells by computing the distance preferably by the sand line or other line as it is let down from the earth's surface to the bottom of the well.
Date: May 21, 1918
Creator: Richardson, Robert B.
Partner: UNT Libraries Government Documents Department

Support for Telegraph Line-Wires and the Like.

Description: Patent for "supports for telegraph and telephone line wires, electric light line wires, and the like, and the object is to provide simple and highly efficient brackets for holding such wires securely in place ... so that the wires will not drop to the ground" (lines 10-18), including instructions and illustrations.
Date: May 21, 1918
Creator: Wilson, James F.
Partner: UNT Libraries Government Documents Department

Pipe-Tongs.

Description: Patent for "a new and useful improvement in pipe-tongs" (lines 5-6) including illustrations and instructions.
Date: July 21, 1914
Creator: Meredith, John De Witt
Partner: UNT Libraries Government Documents Department

Cultivator

Description: Patent for improvements to cultivators.
Date: May 21, 1901
Creator: Skeen, Virgil G.
Partner: UNT Libraries Government Documents Department

Boring and Threading Tool.

Description: Patent for an inexpensive, efficient boring and threading tool that "will enable a smooth and even surface to be produced with a minimum of skill on the part of the operator" (lines 18-21).
Date: June 21, 1921
Creator: Wells, Daniel Doolittle
Partner: UNT Libraries Government Documents Department

Adding-Machine.

Description: Patent for an inexpensive, simple, easily operated, and improved registering machine that is meant to add numbers without mistakes. It uses revoluble number wheels and a spring-returned shaft among other materials.
Date: March 21, 1893
Creator: Brooks, Augustus J.
Partner: UNT Libraries Government Documents Department
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