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Patents for Diamond Machine Co.
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	261,848	Aug. 01, 1882	B.H. Hadley	Emery Grinder
	388,784	Aug. 28, 1888	F. Mossberg	Twist-drill-grinding attachment
	389,095	Sep. 04, 1888	F. Mossberg	Twist-drill-grinding attachment

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