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All Patents in class 76/108.6
Patents 1 - 8 of 8
First set of recordsLast set of records
6,305Apr. 10, 1849N.C. Sanford, L.B. SmithMachine for regulating the twist and diameter of screw-augerstool making machines
8,032Apr. 08, 1851H. StraitSaw-setsaw sets
10,744Apr. 04, 1854A. PeaseDrill for metal gun-barrelsdrill bits
189,265Apr. 03, 1877J.C. RichardsonImprovement in Gimlets and Twist-Drillsmaking drills and augers
341,084May 04, 1886F.E. WhitneyManufacture of Twist-Drillsmaking drills and augers
392,119Oct. 30, 1888M. HardsocgMethod of Twisting Augersmaking drills and augers
1,285,589Nov. 26, 1918H.L. BarnesMethod of Making Drillsmaking drills and augers
2,129,417Sep. 06, 1938C.G. GaseEnd millmilling machine cutters
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