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Rotary
Patent for a rotary with the rotary table secured onto the base. Illustrations included.
Date:
November 19, 1912
Creator:
Decker, Harry R.
System:
The Portal to Texas History
Drill
Patent for a drill used for rotary drilling. Illustrations included.
Date:
November 19, 1912
Creator:
Sullivan, James C.
System:
The Portal to Texas History