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Clamp
Patent for a clamp. This device is employed to use a hoisting line attached to well casing or tubing. Illustration included.
Date:
November 22, 1910
Creator:
Athey, Earl
System:
The Portal to Texas History
Friction-Clutch.
Patent for certain new and useful improvements in friction clutches, including instructions and illustrations.
Date:
November 22, 1898
Creator:
Clarke, George R.
System:
The Portal to Texas History