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All Patents in class 418/200
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	218,874	Aug. 26, 1879	H. Graf	Rotary Engine
	728,263	May 19, 1903	J.P. Magney, W.H. Masterman	Rotary Engine
	2,028,414	Jan. 21, 1936	H. Schneider	Fluid Displacement Device
	2,460,310	Feb. 01, 1949	G. Rathman	Screw pump
	3,100,450	Aug. 13, 1963	E.J. Svenson	Hydraulically Actuated Machine Tool

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