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Aerodrome
Patent for an aerodrome. Illustrations included.
Date:
April 16, 1912
Creator:
Helm, Amos J.
System:
The Portal to Texas History
Well-Casing Extractor
Patent for a well-casing extractor that provides gripping rollers for engaging the casing, provides a supporting frame for the movable parts of the apparatus, and provides the means to drive the rollers by power or hand.
Date:
August 16, 1921
Creator:
{Price, Filmore M.}
System:
The Portal to Texas History