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US Patent: 639,035
Chuck for emery-wheels
Patentee: Gilbert Hart (exact or similar names) - Detroit, MI USPTO Classifications: 451/548 Tool Categories: industrial tools : grinding wheels metalworking machines : grinders : sharpening machines : grinding wheels Assignees: None Manufacturer: Not known to have been produced Witnesses: A. A. Ballou Frank H. Whelden	Patent Dates: Applied: Jul. 01, 1899 Granted: Dec. 12, 1899 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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