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Improvement in Rotary Engines.

Description: Patent for an improved design of the rotary engine. Illustration included.
Date: February 6, 1877
Creator: Willson, Hodgen I.
Partner: UNT Libraries Government Documents Department

Improvement in Current-Wheels.

Description: Patent for improvements in current-wheels, consisting of an improved arrangement of feathering-buckets, the gate, and opening devices. It includes a description and illustration.
Date: June 6, 1871
Creator: Tuder, William
Partner: UNT Libraries Government Documents Department
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