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Stirrup

Description: Patent for a stirrup. Illustration included.
Date: January 22, 1907
Creator: Levy, John Victor
Partner: UNT Libraries Government Documents Department

Improvement in Pile-Drivers.

Description: Patent for an improved pile-driver device which automates the release of the pile-driver hammer as well as including a perpendicular device which advances the device longitudinally as the work progresses.
Date: January 22, 1875
Creator: McDermott, Martin
Partner: UNT Libraries Government Documents Department
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