UNT Libraries Government Documents Department - 2 Matching Results

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Feed-Trough

Description: Patent for a feed trough for chickens and other small animals.
Date: September 24, 1912
Creator: Davis, James H.

Rock Drill

Description: Patent for a rock drill. This invention is designed for use with a pitman driven by a crank movement or a direct ratchet connected to a driving rod. Illustrations included.
Date: December 24, 1912
Creator: Speer, George F.
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