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US Patent: 3,538,649
Apparatus for Sharpening Multiedge Tools
Patentee: Thurston V. Williams (exact or similar names) - Wilton, Hillsborough County, NH USPTO Classifications: 451/239, 451/48 Tool Categories: metalworking machines : grinders : sharpening machines : cutter grinding machines Assignees: O. K. Tool Co., Inc. - Milford, Hillsborough County, NH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Sep. 23, 1968 Granted: Nov. 10, 1970 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for O.K. Tool Co., Inc.

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