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US Patent: 1,613,174
Device for stoning cutters
Patentee: Christian C. Koeln (exact or similar names) - St. Louis, MO USPTO Classifications: 451/374, 451/409 Tool Categories: metalworking machines : grinders : sharpening machines Assignees: Davis Boring Tool Co. - St. Louis, MO Manufacturer: Davis Boring Tool Co. - St. Louis, MO Witnesses: Unknown	Patent Dates: Applied: May 18, 1923 Granted: Jan. 04, 1927 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Davis Boring Tool Co.

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