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Power Transmission.

Description: Patent for a power transmission that has a gear that can provide different speeds. This transmission is a simple construction that allows for the driver to easily choose the gear, which allows high efficiency in operation.
Date: September 16, 1919
Creator: Cook, William A.

Mechanical Movement.

Description: Patent for improved manner of rotary movement on various machines. Includes illustrations.
Date: December 16, 1902
Creator: Gibson, Levi D.
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