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Windmill-Regulator.

Description: Patent for an automatic windmill regulator, which turns the windmill in and out of the wind based on the water level of the water tank.
Date: July 12, 1910
Creator: Echols, Champ T.
Partner: UNT Libraries Government Documents Department

Ventilator

Description: Patent for Ventilator
Date: September 12, 1916
Creator: Curtis, Thomas R
Partner: UNT Libraries Government Documents Department

Cultivator.

Description: Patent for a cultivator, by William J. Gillentine. It provides a means to adjust cultivator shovel-gangs relative to each other. Includes a lever-and-ratchet mechanism.
Date: June 12, 1906
Creator: Gillentine, Willliam A.
Partner: UNT Libraries Government Documents Department
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