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Patents for James C. Spencer
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
354,359Dec. 14, 1886J.C. SpencerHandle for screw-drivers and other toolsspiral screwdrivers
380,360Apr. 03, 1888J.G. Smith, J.C. SpencerCombined Rule, Square, Bevel, Calipers, &c.marking gauges
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