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Rotary Boring Machine.
Patent for a rotary boring machine, which automatically sends out of the machine mud it digs up and can have the rotary pinion easily removed.
Date:
March 31, 1908
Creator:
Wiggs, James A., Jr.
System:
The Portal to Texas History
Rotary Explosive-Engine.
Patent for a rotary explosive engine which minimizes the waste of power.
Date:
March 31, 1908
Creator:
Walker, James C.
System:
The Portal to Texas History