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Jack.

Description: Patent for a jack for lifting heavy loads on railroads, which has an automatic steady movement of the load up and down without adjusting the jack settings.
Date: August 6, 1907
Creator: Blake, David Alexander & Blake, Charles William
Partner: UNT Libraries Government Documents Department

Improvement in Insect-Destroyers.

Description: Patent for a device to destroy "winged insects which are destructive to the cotton plants and other vegetation" (lines 19-21) including instructions and illustrations.
Date: December 6, 1870
Creator: Byrne, Thomas; Strunk, Diedrich & Schott, J. J.
Partner: UNT Libraries Government Documents Department

Coin-Controlled Vending-Machine

Description: Patent for a coin-operated vending machine. Illustrations included.
Date: June 6, 1911
Creator: Boucher, Horace E.
Partner: UNT Libraries Government Documents Department
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