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Patents for Oscar J. Pennell
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
120,594Nov. 07, 1871O.J. Pennell, G. ZimmerImprovement in dovetailing-machinesdovetailing machines
157,134Nov. 24, 1874O.J. Pennell, G. ZimmerImprovement in sash-dovetailing machinesdovetailing machines
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