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All Patents in class 451/331
Patents 1 - 15 of 17
First set of recordsNext set of recordsLast set of records
24,196May 31, 1859W. ClemsonMachine for Grinding Sawsmaking sawblades
78,915Jun. 16, 1868E.C. AtkinsImprovement in machines for polishing metal platestool making machines
132,231Oct. 15, 1872A. AssmanImprovement in Grinding Apparatusgrinding machines
RE5,228Jan. 07, 1873A. WarthMachine for cutting lead pencilspencil making machines
430,398Jun. 17, 1890J.M. NashMachine for smoothing curved surfacessanding machines
483,288Sep. 27, 1892A.B. LandisGrinding-machinegrinding machines
672,511Apr. 23, 1901J.M. NashAbrading-machinesanding machines
704,348Jul. 08, 1902J.N. LapointeGrinding-machinedrill sharpening machines
734,897Jul. 28, 1903A.B. LandisAutomatic grinding-machinegrinding machines
957,935May 17, 1910C.M. ConradsonGrinding Machine Feeding Mechanismgrinding machines
2,535,439Dec. 26, 1950J. McEwanSaw sharpenersaw sharpening machines
2,635,395Apr. 21, 1953P.A. Grobey, M.H. ArmsMachine for grinding internal surfaces concentric with external surfacesgrinding machines
2,821,818Feb. 04, 1958W.S. Swanson, H.E. McGeeLapping Machine and Automatic Feed Mechanism Thereforlapping machines
2,835,085May 20, 1958J.F. MantingMagnetic dial feeder
2,958,989Nov. 08, 1960R.F. PendergastSpreading and feeding assemblysanding machines
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