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Apparatus for Cleaning Deep Wells.
Patent for a device that uses hot steam to clean caked-on paraffin, mud, and other substances out of oil well pumping apparatuses.
Date:
July 31, 1917
Creator:
Deats, George W.
System:
The Portal to Texas History
Electromechanical Switch Thrower
Patent for an electromechanical switch thrower. Illustration included.
Date:
July 31, 1906
Creator:
Posey, James A.
System:
The Portal to Texas History