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All Patents in class 451/372
Patents 1 - 15 of 16
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NumberDatePatenteeTitleType
62,945Mar. 19, 1867P.V. DunnImproved method of holding edged tools on grindstonessharpening jigs and fixtures
78,863Jun. 16, 1868M.C. CronkGrinding Harvester Knivestool grinders
79,030Jun. 16, 1868J.A. ThompsonSharpening Mowing-Machine Knivessharpening machines
87,150Feb. 23, 1869B.F. DavisImprovement in Machines for Grinding the Knives of Mowing Machinestool grinders
193,437Jul. 24, 1877V.F. Prentice, E.J. WorcesterImprovement in machines for grinding mower and reaper knivesgrinders
205,416Jun. 25, 1878L.D. Dana, F.D. RandallImprovement in Grinding-Machinesgrinders
342,125May 18, 1886J.C. NeffMower and Reaper Knife Grindersharpeners
342,290May 18, 1886R. DuttonMachine for Grinding Mowing Machine Knivessharpeners
359,964Mar. 22, 1887R. DuttonMachine for grinding mower-knivessharpeners
567,638Sep. 15, 1896A.R. ClizbeGrinding Machinesharpeners
583,443Jun. 01, 1897H. AllenMowing-machine sharpener
611,893Oct. 04, 1898A.R. ClizbeGrinding Machinesharpeners
636,192Oct. 31, 1899H.W. BolensGrinding Machinesharpeners
1,163,016Dec. 07, 1915K.C. KnudsonTool Holder for Grindstonessharpening tool holders
1,253,829Jan. 15, 1918T. JacobsSickle Grindersharpeners
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