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Patents for Robert H. Boyd
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	47,812	May 23, 1865	W.W. Grier, R.H. Boyd	Improved drill-bit
	RE2,712	Aug. 06, 1867	R.H. Boyd, W.W. Grier	Improved Machine for Making Augers

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