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Patents for Frank H. Underwood
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	186,965	Feb. 06, 1877	J.E. Underwood, F.H. Underwood	Improvement in belting
	219,606	Sep. 16, 1879	J.E. Underwood, F.H. Underwood	Improvement in belting

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