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Trap-Gun.

Description: Patent for a trap gun, which can be mounted on a post or in the ground.
Date: August 9, 1910
Creator: Lindsey, William Milton
Partner: UNT Libraries Government Documents Department

Pump-Valve Mechanism.

Description: Patent for a pump valve mechanism for use in deep wells, which can be easily removed for cleaning and repair,
Date: August 13, 1907
Creator: Sheen, Davis
Partner: UNT Libraries Government Documents Department
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