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Patents for J. B. Simcock
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	205,362	Jun. 25, 1878	L.D. Dana	Improvement in friction-clutches
	205,416	Jun. 25, 1878	L.D. Dana, F.D. Randall	Improvement in Grinding-Machines

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