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All Patents in class 74/589
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	264,859	Sep. 26, 1882	J.C. Butterfield	Atmospheric hammer
	292,525	Jan. 29, 1884	C.C. Worthington	Duplex pumping-engine
	933,799	Sep. 14, 1909	I.J. Van Huffel, Jr.	Adjustable Work Holder

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