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All Patents in class 418/180
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	2,489,887	Nov. 29, 1949	C.R. Houghton	Rotary pump
	2,684,637	Jul. 27, 1954	R.W. Erikson	Gear pump
	2,774,309	Dec. 18, 1956	O.W. Scheflow, L.T. Stoyke	Pump

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