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US Patent: 3,209,494
Method and Apparatus for Grinding Annular Workpieces
Patentee: William B. Seidel (exact or similar names) - Cincinnati, Hamilton County, OH USPTO Classifications: 451/24, 451/242, 451/397, 451/49, 451/51 Tool Categories: metalworking machines : grinders : cylindrical grinders manufacturing : manufacturing processes Assignees: Cincinnati Milling Machine Co. - Cincinnati, Hamilton County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 15, 1962 Granted: Oct. 05, 1965 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cincinnati Milling Machine Co.

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