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Tool-Sharpener.

Description: Patent for a tool sharpener for various farm equipment such as plows or tools.
Date: March 23, 1909
Creator: Kirksey, Elijah F. & Stegall, John T.
Partner: UNT Libraries Government Documents Department

Automatic Air-Brake Coupling

Description: Patent for an air-brake coupling for railroad cars which connects cars automatically and can be fully controlled by the train engineer in the engine.
Date: July 23, 1907
Creator: McMillan, Thomas B.
Partner: UNT Libraries Government Documents Department

Coupling

Description: Patent for a coupler designed to connect the pipes of train cars. Illustrations included.
Date: June 23, 1908
Creator: Mc.Millan, Thomas B.
Partner: UNT Libraries Government Documents Department
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