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All Patents in class 417/526
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	3,899	Jan. 31, 1845	W.N. Clark	Single-Twist Auger, Gimlet, &c.
	56,671	Jul. 24, 1866	J.W. Douglas	Double acting pump
	202,633	Apr. 23, 1878	N. Clute	Double-Acting Suction and Force Pump

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