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Rail-Joint.

Description: Patent for a rail joint, which does need bolts to fasten it together.
Date: December 7, 1909
Creator: Perkins, Wallace P.
Partner: UNT Libraries Government Documents Department

Combination Valve and Cap Tool

Description: Patent for a combination valve cap and stem used to ease the process of deflating pneumatic tires by eliminating the need to keep track of a separate cap piece when removing the valve core, including illustrations and instructions for use.
Date: May 7, 1918
Creator: McComb, William Perry
Partner: UNT Libraries Government Documents Department
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