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Detachable Drill-Bit.

Description: Patent for a detachable drill bit for use in drilling deep wells via the rotary method, where the bit can be replaced with the drill stem still in the bore.
Date: March 23, 1916
Creator: Carden, David A.
Partner: UNT Libraries Government Documents Department

Resilient Wheel

Description: Patent for an improved automobile spring wheel that has an auxiliary tread and is separate from the spokes, so that it adds cushioning to the spokes.
Date: March 23, 1916
Creator: Luttrell, William J.
Partner: UNT Libraries Government Documents Department
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