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Rotary Engine

Description: Patent for "a simple and efficient construction of engine including two parallel series of piston-heads and wherein steam will be supplied to the heads of each series alternately" (lines 9-13).
Date: July 9, 1901
Creator: Keith, Jonathan
Partner: UNT Libraries Government Documents Department

Improvement in Rotary Engines.

Description: Patent for improvements in valves used in rotary engines.
Date: May 9, 1871
Creator: Hughes, Robert
Partner: UNT Libraries Government Documents Department