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Cotton Chopper

Description: Patent for Cotton Chopper
Date: January 2, 1917
Creator: Wills, Saladin H.
Partner: UNT Libraries Government Documents Department

Envelop.

Description: Patent for an envelope that employs a lock and seal mechanism to increase security of contents. The envelope cannot be opened without tampering or mutilating the envelope.
Date: January 26, 1915
Creator: Wallace, Curtis C.
Partner: UNT Libraries Government Documents Department

Car Coupling

Description: Patent for train car coupling. Illustration included.
Date: January 17, 1905
Creator: Jones, Evan S.
Partner: UNT Libraries Government Documents Department
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