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Rail-Joint.

Description: Patent for an improved rail joint that utilizes an interlocking system, thus eliminating the need for connections using nuts and bolts, resulting in a smoother, continuous rail.
Date: July 17, 1917
Creator: Luker, Luther V.
Partner: UNT Libraries Government Documents Department

Bailer.

Description: Patent for improved bailer for deep wells (e.g., oil wells), cheaper to use and manufacture, with a better delivery gate and improved method for triggering gate closure upon bailer withdrawal.
Date: July 26, 1921
Creator: Swartz, Ira
Partner: UNT Libraries Government Documents Department
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