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Internal Combustion and Air Compressing Engine

Description: Patent for internal combustion and air compressing engine. Illustration included.
Date: October 19, 1909
Creator: Risley, Ward & Risley, Zeph L.
Partner: UNT Libraries Government Documents Department

Rotary Reversible Engine

Description: Patent for rotary reversible engine. Illustrations included.
Date: October 19, 1909
Creator: Risley, Ward & Risley, Zeph L.
Partner: UNT Libraries Government Documents Department
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