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Patents for John S. Spofford
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	RE8,215	May 07, 1878	N. Spofford	Improvement in braces for bits
	225,768	Mar. 23, 1880	N. Spofford	Bit-brace
	234,624	Nov. 16, 1880	N. Spofford	Bit-brace

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