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US Patent: 607,306
Twist-drill-grinding machine
Patentee: Oakley S. Walker (exact or similar names) - Worcester, MA USPTO Classifications: 451/375 Tool Categories: metalworking machines : grinders : drill grinders Assignees: None Manufacturer: O. S. Walker & Co. - Worcester, MA Witnesses: C. W. Wood Edna I. Tyler	Patent Dates: Applied: Sep. 13, 1897 Granted: Jul. 12, 1898 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for O. S. Walker & Co.

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