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US Patent: 286,663
Grinding Machine for Producing the Relief on Twist and Fluted Drills
Patentee: Henry F. Wheeler (exact or similar names) - Leominster, Worcester County, MA USPTO Classifications: 451/216, 451/239 Tool Categories: metalworking machines : grinders : tool grinders tool making : making drills and augers Assignees: Union Twist Drill Co. - Leominster, Worcester County, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 04, 1883 Granted: Oct. 16, 1883 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Union Twist Drill Co.

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