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Patents for E. Oscar Haeuptner
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
75,273Mar. 10, 1868G.W. Hubbard, S.A. SmithImprovement in grinding-mills
111,582Feb. 07, 1871S.A. SmithImprovement in pulleysindustrial machine pulleys and belt drive mechanisms
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