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All Patents in class 451/222
Patents 1 - 13 of 13
First set of recordsLast set of records
99,970Feb. 15, 1870J. SwanMachine for Grinding & Polishing Bitsmaking drills and augers
187,770Feb. 27, 1877L. Sharpe, executor, C.D. Owen, executor, J.R. Brown (deceased), estate ofGrinding Machinecylindrical grinders
303,239Aug. 05, 1884J. SwanMechanism for Manufacturing Augersmaking drills and augers
407,721Jul. 23, 1889J.D. Cox, Jr.Machine for back-clearing twist-drillstool making machines
1,238,934Sep. 04, 1917C.G. OlsonLathemetal lathes
1,259,770Mar. 19, 1918C.G. OlsonGrinding Machine
1,275,218Aug. 13, 1918C.H. CalkinsMachine for Grinding Worm Threads
1,835,687Dec. 08, 1931H.M. AllisonBacking-Off Mechanism for Grinding Machinesgrinding attachments
1,989,792Feb. 05, 1935J.C. DraderAutomatic Machine Tooltool grinders
2,003,263May 28, 1935H.Q. MunnAdjustable Work Carrying Tablemetalworking machine mechanisms
2,125,584Aug. 02, 1938E. RotzoliAdjusting Device for Machine Toolsmetalworking machines
2,169,159Aug. 08, 1939G. MöllerMeans for Accurate Screw Cuttingmetalworking machines
2,623,333Dec. 30, 1952W.G. BaldenhoferApparatus for Grindingcylindrical grinders
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