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All Patents in class 220/327
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	510,300	Dec. 05, 1893	E.R. Stilwell	Feed-water-purifier attachment
	584,592	Jun. 15, 1897	E.E. Johnson	Piston-pump
	639,014	Dec. 12, 1899	W.A. Bradley	Device for Manipulating Tank Covers
	2,781,941	Feb. 19, 1957	G.W. Lindsay	Vertical vent fitting
	3,071,398	Jan. 01, 1963	J.A. Henning	Locking Ring

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