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Wrench.

Description: Patent for a wrench specifically made to remove well drill bits from the drill.
Date: April 13, 1920
Creator: Stover, Willard L.
Partner: UNT Libraries Government Documents Department

Lens-Holder.

Description: Patent for a lens holder meant to provide a "simple, relatively inexpensive and efficient means" (line 10) of securing the lens in the headlamps of an automobile or similar lamp casing.
Date: April 13, 1920
Creator: Marshall, Stanley G.
Partner: UNT Libraries Government Documents Department

Windmill-Gearing

Description: Patent for improved windmill gearing, intended to reduce stain on the machinery
Date: April 13, 1920
Creator: Roberts, George W.
Partner: UNT Libraries Government Documents Department

Well-Packer.

Description: Patent for an improved well drilling device called a "packer", in which this version has a reduced likelihood of the seals between separate parts being damaged and needing replacement.
Date: April 13, 1920
Creator: Fletcher, Harold W.
Partner: UNT Libraries Government Documents Department

Pump.

Description: Patent for a pump specifically designed for oil wells to make drilling oil more efficient, lucrative, and easier to perform.
Date: April 13, 1920
Creator: Carden, David A.
Partner: UNT Libraries Government Documents Department

Cotton-Chopping Machine

Description: Patent for a cotton "wheeled cultivator" (line 14-15) attachment which allows users to make adjustments to the cultivator blades, including illustrations.
Date: April 13, 1920
Creator: Sims, James G.
Partner: UNT Libraries Government Documents Department

Testing Device.

Description: Patent for a testing device that can be used to test the condition of the pistons in an internal combustion motor. The device can also be used as an "air pump, or grease or oil gun." (lines 30-31).
Date: April 13, 1920
Creator: Harpst, Frederick E.
Partner: UNT Libraries Government Documents Department
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