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All Patents in class 417/510
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	578,950	Mar. 16, 1897	J. Stumpf	Pump
	831,982	Sep. 25, 1906	J.F. Patitz	Valve for blowing-engines
	835,712	Nov. 13, 1906	J.F. Patitz	Valve for blowing-engines

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