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Rotary Drill (open access)

Rotary Drill

Patent for Rotary Drill
Date: August 22, 1916
Creator: Griffin, Thomas J.
System: The Portal to Texas History
Rotary Drill (open access)

Rotary Drill

Patent for Rotary Drill
Date: August 22, 1916
Creator: Grinffin, Thomas. J
System: The Portal to Texas History