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Rotary Drilling-Machine
Patent for a rotary drilling machine for drilling oil wells. Illustrations included.
Date:
February 18, 1913
Creator:
Black, Lee J.
System:
The Portal to Texas History
Sectional Dam and Flume
Patent for a sectional dam and flume for small waterways that takes the water to a turbine.
Date:
February 4, 1913
Creator:
Holmes, Clayton F.
System:
The Portal to Texas History