Patents for Nicholas B. Hadley


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Patents for Nicholas B. Hadley
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	91,117	Jun. 08, 1869	N.B. Hadley	Improvement in machines for threading screws
	106,153	Aug. 09, 1870	N.B. Hadley	Improvement in scroll-saw