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US Patent: 153,401
Improvement in machines for sharpening twist-drills
Patentee: Claus Van Haagen (exact or similar names) - Philadelphia, PA USPTO Classifications: 451/375 Tool Categories: metalworking machines : grinders : drill grinders metalworking machines : grinders : sharpening machines : drill sharpening machines Assignees: Claus Van Haagen - Philadelphia, PA Anthony Van Haagen - Philadelphia, PA Manufacturer: C. Van Haagen & Co. - Philadelphia, PA Witnesses: William A. Steel Harry Smith	Patent Dates: Applied: Jun. 01, 1874 Granted: Jul. 21, 1874 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for C. Van Haagen & Co.

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