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Lock

Description: Patent for a lock used to secure the openings of grain bags. Illustrations included.
Date: May 17, 1910
Creator: Chambless, James A.
Partner: UNT Libraries Government Documents Department

Pump Jack

Description: Patent for an improved double-acting pump jack that will require less parts and external force to operate and maintain.
Date: April 29, 1919
Creator: Lively, William
Partner: UNT Libraries Government Documents Department
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