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All Patents in class 417/569
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	2,895	Dec. 31, 1842	W. Douglas, B. Douglas	Pump
	23,649	Apr. 12, 1859	W. Douglas, B. Douglas	Pump
	2,444,159	Jun. 29, 1948	L.E. Godfriaux	Fluid Pump

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