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Method of Sealing The Walls of Oil-Wells
Patent for a method of sealing oil wells to avoid applying casing to the wells to prevent leakage, seepage, or cave-ins.
Date:
December 7, 1920
Creator:
Nolan, William E.
System:
The Portal to Texas History
Draft-Equalizer.
Patent for Draft Equalizer. Patent states this invention "relates to the new and useful improvements in draft-equalizers" (lines 10-11). Includes instructions and illustrations.
Date:
February 20, 1918
Creator:
Dudley, Thomas J. & Bryant, Marvin H.
System:
The Portal to Texas History