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US Patent: 3,816,998
Method of and apparatus for rapidly abrading metal workpieces
Patentees: Donald C. Elm (exact or similar names) - St. Paul, MN Howard W. Grivna (exact or similar names) - Minneapolis, MN USPTO Classifications: 451/24, 451/307, 451/403, 451/59 Tool Categories: metalworking machines : metal sanding machines Assignees: Timesavers, Inc. - Minneapolis, MN Manufacturer: Timesavers, Inc. - Minneapolis, MN Witnesses: Unknown	Patent Dates: Applied: May 16, 1973 Granted: Jun. 18, 1974 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Timesavers, Inc.

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