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CA Patent: CA-250,547
Boring tool
Patentee: Christian C. Koeln (exact or similar names) - St. Louis, MO USPTO Classifications: Tool Categories: metalworking machines : drilling and boring : boring heads Assignees: Davis Boring Tool Co. - St. Louis, MO Manufacturer: Davis Boring Tool Co. - St. Louis, MO Witnesses: Unknown	Patent Dates: Granted: Jun. 09, 1925 Patent Pictures: CIPO Data Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Davis Boring Tool Co.

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