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Patents for Frank W. Lindgren
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	642,313	Jan. 30, 1900	L. Faust, F.W. Lindgren	Hinge-mortising machine
	741,685	Oct. 20, 1903	F.W. Lindgren	Lock
	798,737	Sep. 05, 1905	L. Faust, F.W. Lindgren	Frictional gearing

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