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Patents for E. Oscar Hamptner
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	73,100	Jan. 07, 1868	G.W. Hubbard	Improvement in shaft-coupling
	75,307	Mar. 10, 1868	S.A. Smith	Improvement in flour-bolts
	111,152	Jan. 24, 1871	S.A. Smith	Improvement in couplings for shafting

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