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All Patents in class 451/200
Patents 1 - 6 of 6
First set of recordsLast set of records
8,929May 04, 1852W. SouthwellMachinery for grinding or polishing saw-blades, &c.tool making
390,931Oct. 09, 1888B.D. WhitneySharpening-machineindustrial machine gearing
407,721Jul. 23, 1889J.D. Cox, Jr.Machine for back-clearing twist-drillstool making machines
2,032,589Mar. 03, 1936E.A. OverstedtGear Lapping Machinegear lapping machines
2,232,408Feb. 18, 1941S.M. ShawGear Finishing Machinegear making machines
2,561,004Jul. 17, 1951W.G. Baldenhofer, J.C. WilsonMethod and Apparatus for Grindingsurface grinders
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