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Patents for C. F. Washburn
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
145,488Dec. 16, 1873P.D. CummingsGrinding Machinesgrinders
160,029Feb. 23, 1875F.L. Pinney, R.H. HastyImprovement in lumber-carrierssawmill accessories
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