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in creator/contributor: "Gibson, C. E."  
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Tank

Description: Patent for a tank that filters.
Date: January 23, 1917
Creator: Gartrell, Clifford E.
Partner: UNT Libraries Government Documents Department

Railroad Signal

Description: Patent for a railroad signal. This invention is an improvement for signalling by the trains interaction on the rails. Illustration included.
Date: April 30, 1907
Creator: Harvey, Albert Wadkins
Partner: UNT Libraries Government Documents Department
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