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Patents for Donald C. Elm
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
3,816,998Jun. 18, 1974H.W. Grivna, D.C. ElmMethod of and apparatus for rapidly abrading metal workpiecesmetal sanding machines
3,893,265Jul. 08, 1975D.C. Elm, A.J. StinnVertical abrasive belt type surface grindermetal sanding machines
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