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Patent for improvements to derricks which make them portable and easily manipulated. Includes instructions and illustrations.

Date: December 8, 1891

Creator: Hurd, George Murray

Partner: UNT Libraries Government Documents Department

Patent for post hole digger with a simple construction which can be manufactured at a comparatively smaller cost.

Date: December 22, 1914

Creator: Day, James M.

Partner: UNT Libraries Government Documents Department

Patent for a clothes pin that is durable and strong.

Date: December 7, 1909

Creator: French, Alfonso Claude

Partner: UNT Libraries Government Documents Department