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All Patents in class 76/108.6
Patents 1 - 7 of 7
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
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