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All Patents in class 451/558
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
41,646Feb. 16, 1864D. SlateImproved apparatus for grinding cutter-bits for rifling-machines
189,483Apr. 10, 1877M.H. McNairDevices for Fitting and Polishing Cylinders and Ringsmandrels and arbors
2,442,088May 25, 1948C. KreutzerDressing Tool Holdergrinder dressers
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