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Cotton-Cleaner.

Description: Patent for a simple and effective cotton cleaning machine that removes foreign matter from cotton before or after ginning. This enhances the cotton's worth and quality. The cotton will not get torn during this process.
Date: May 9, 1893
Creator: Smith, Jonathan N.
Partner: UNT Libraries Government Documents Department

Milk-Cooler

Description: Patent for a milk cooler that may be used to keep milk or other food items chilled without the use of ice. Illustrations included
Date: June 2, 1908
Creator: Hay, Perrie
Partner: UNT Libraries Government Documents Department

Mechanical Dentistry.

Description: Patent for new and improved mechanical dentistry. This design consists in "[a] dental plate provided with a series of holes or perforations and a continuous groove upon the upper surface of the plate communicating with the holes or perforations therein" (lines 62-65).
Date: May 18, 1886
Creator: Mayfield, William Dudley
Partner: UNT Libraries Government Documents Department

Plow

Description: Patent for a plow. It "is to provide an improved plow stock or frame having an adjustable foot to regulate the inclination or pitch of the plow-point" (p. 2).
Date: August 7, 1888
Creator: Whatley, George Washington, of Dallas County, Assignor of One Half to George W. Marris, of Rockwall County, Texas
Partner: UNT Libraries Government Documents Department

Rotary Engine

Description: Patent is for a rotary engine. The design of this rotary engine includes an inlet and exhaust that also prevents internal leakage of working fluid under pressure.
Date: May 8, 1912
Creator: Bennison, Samuel
Partner: UNT Libraries Government Documents Department