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US Patent: 3,109,270
Drill Grinding Method
Patentee: William A. Haggerty (exact or similar names) - Cincinnati, Hamilton County, OH USPTO Classifications: 451/48 Tool Categories: metalworking machines : grinders : drill 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: Apr. 22, 1960 Granted: Nov. 05, 1963 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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