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Patents for Frank B. Sloan
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
194,221Aug. 14, 1877F.S. ClarksonImprovement in cutter-heads for grooving and channelingcutterheads
RE8,586Feb. 18, 1879E.H. Clarkson, W.H. KeslerImprovement in sash-cord guides
216,767Jun. 24, 1879F.S. Clarkson, F.B. SloanImprovement in sash-cord guidesdoor and window hardware
RE9,221Jun. 01, 1880E.H. ClarksonMortising-machinemortising machines
249,306Nov. 08, 1881F.S. ClarksonMortising-machinemortising machines
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