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US Patent: 622,212
Twist-drill grinder
Patentee: Rufus Dutton (exact or similar names) - Sing Sing, NY USPTO Classifications: 29/DIG.09, 451/375, 451/442, 451/65 Tool Categories: metalworking machines : grinders : drill grinders Assignees: Mary C. Dutton - Sing Sing, NY Manufacturer: Not known to have been produced Witnesses: Bernard J. Isecke Henry V. Brown	Patent Dates: Applied: Dec. 31, 1897 Granted: Apr. 04, 1899 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: The inventor was deceased and Mary C. Dutton was his "executrix". This drill grinder uses the face and not the sides of the grinding wheel.

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