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Silo Construction

Description: Patent for silo, with walls constructed out of plastic,
Date: January 16, 1917
Creator: Pierson, Ludvig B.
Partner: UNT Libraries Government Documents Department

Railroad-Switch

Description: Patent for a railroad switch that is easier to use and more effective than the "common stub switch" (lines 10-11), thereby reducing damage.
Date: December 16, 1919
Creator: Cuellar, Samuel D.
Partner: UNT Libraries Government Documents Department
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