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Well-Screen

Description: Patent for a modification to Mr. Layne's previous Patent No. 1,062,717, including illustrations.
Date: February 24, 1914
Creator: Layne, Mahlon E.
Partner: UNT Libraries Government Documents Department

Drill Bit

Description: Patent for a drill bit that can pass through the drill stem, making the process of drilling faster and easier.
Date: February 24, 1920
Creator: Clements, Frank L., Jr.
Partner: UNT Libraries Government Documents Department
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