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Wrench.

Description: Patent for "a wrench in which the ratchet is inclosed, so that none of its parts will be exposed to the action of dust" (lines 16-18), provides ample lubrication, and ease of inspection. Includes instructions and illustrations.
Date: June 2, 1912
Creator: Sherman, Lothrop C.
Partner: UNT Libraries Government Documents Department

Mail-Receiving Apparatus

Description: Patent for a mail receiving apparatus for use with trains that automatically removes mailbags from the train.
Date: June 4, 1912
Creator: Mainer, William L.
Partner: UNT Libraries Government Documents Department

Mail-Handling Apparatus

Description: Patent for a mail handling apparatus for storing and delivering mail to trains that is on an automated timer with the train schedule.
Date: June 4, 1912
Creator: Mainer, William L.
Partner: UNT Libraries Government Documents Department

Drill-Bit

Description: Patent for a drill bit for oil wells that provides a way for the bit to be lubricated while in use to prevent the adhesion of gummy substances.
Date: June 4, 1918
Creator: Kilgore, John G.
Partner: UNT Libraries Government Documents Department
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