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Patents for W. C. Hard
Patents 1 - 4 of 4
First set of recordsLast set of records
41,396Jan. 26, 1864J. RichardsImprovement in in Trying-Squarestry squares
65,183May 28, 1867W.H. Doane, J. RichardsImprovement in shaft-couplingindustrial machine shaft couplings
67,676Aug. 13, 1867J. RichardsLathe head-stockwood lathes
69,954Oct. 15, 1867J. RichardsStandard Gaugesmeasuring tools
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