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US Patent: 496,891
Center Grinder
Patentee: Charles H. Norton (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 451/436 Tool Categories: metalworking machines : metal lathes : metal lathe accessories and attachments Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 23, 1892 Granted: May 09, 1893 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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