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All Patents in class 418/205
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	12,350	Feb. 06, 1855	B. Holly	Rotary Pump
	237,764	Feb. 15, 1881	E. Medden	Rotary pump
	728,263	May 19, 1903	J.P. Magney, W.H. Masterman	Rotary Engine

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