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CH Patent: CH-348,624
Machine à affûter les forets Drill bit sharpening machine
Patentee: USPTO Classifications: Tool Categories: metalworking machines : grinders : sharpening machines : drill sharpening machines Assignees: Christen & Cie AG - Berne, Switzerland Manufacturer: Christen & Cie AG - Berne, Switzerland Witnesses: Unknown	Patent Dates: Applied: May 16, 1957 Granted: Aug. 31, 1960 Patent Pictures: Espacenet patent Report data errors or omissions to steward Jeff Joslin

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