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Friction-Clutch.

Description: Patent for certain new and useful improvements in friction clutches, including instructions and illustrations.
Date: November 22, 1898
Creator: Clarke, George R.
Partner: UNT Libraries Government Documents Department

Clamp

Description: 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
Partner: UNT Libraries Government Documents Department
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