Counties
Year
Month
1 Matching Results
Results open in a new window/tab.
Results:
1 - 1 of
1
Rotary for Oil-Wells.
Patent for a pipe rotary for use "in sinking oil-wells" (line 10). The patent allows for the power to be applied to the "pipe-sections which constitute the casing of the well" (line 14-15).
Date:
February 6, 1906
Creator:
Bernard, Horace D.
System:
The Portal to Texas History