Patents for Duplex Rotary Engine Co.


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Patents for Duplex Rotary Engine Co.
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	461,161	Oct. 13, 1891	A. Grant, J.S. Kiehl, F. Meyer	Rotary Steam Engine
	464,285	Dec. 01, 1891	F. Meyer	Rotary Steam Engine
	905,476	Dec. 01, 1908	E.W. Gragert, F. Stoehr	Rotary Engine