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Drill-Stem Clamp for Rotary Drilling-Machines
Patent for a rotary well drilling stem clamp which reduces wear on the machine and can be used with different size drill stems.
Date:
September 22, 1908
Creator:
Decker, Harry R.
System:
The Portal to Texas History
Pin-Box and Fastener.
Patent for a pin box fastener, which holds the tape inside the box while allowing the pins to be withdrawn.
Date:
September 22, 1908
Creator:
Kimbler, Henry Randolphus
System:
The Portal to Texas History