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US Patent: 411,845
Drill-grinding machine
Patentee: Oakley S. Walker (exact or similar names) - Worcester, MA USPTO Classifications: 451/380 Tool Categories: metalworking machines : grinders : sharpening machines Assignees: None Manufacturer: O. S. Walker & Co. - Worcester, MA Witnesses: F. E. Knight W. H. Oakes	Patent Dates: Applied: Dec. 23, 1887 Granted: Oct. 01, 1889 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.
Description: This patent date was seen on a "Worcester" twist-drill grinder from O. S. Walker & Co.

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