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US Patent: 159,723
Improvement in grinding apparatus
Patentee: Claus Van Haagen (exact or similar names) - Philadelphia, PA USPTO Classifications: 144/251.1, 29/DIG.09, 451/455 Tool Categories: metalworking machines : grinders : drill grinders Assignees: Claus Van Haagen - Philadelphia, PA Anthony Van Haagen - Philadelphia, PA Manufacturer: C. Van Haagen & Co. - Philadelphia, PA Witnesses: Hubert Howson Harry Smith	Patent Dates: Applied: Nov. 28, 1874 Granted: Feb. 09, 1875 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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