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Corn-Topper.

Description: Patent for corn-toppers for cutting off the heads of Kafir corn, milo maze, and other similar grain plants.
Date: August 28, 1917
Creator: Pletcher, Thomas S.
Partner: UNT Libraries Government Documents Department

Air Pump

Description: Patent for an air pump designed to have a strong cylinder and be able to equal quantities of air upon both the upward and downward motion of the piston.
Date: October 28, 1919
Creator: Keating, Paul W.
Partner: UNT Libraries Government Documents Department
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