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US Patent: 187,593
Emery Grinding Wheels
Patentees: Isaac P. Brown, Jr. (exact or similar names) - Newark, Essex County, NJ Albert A. Sanborn (exact or similar names) - Newark, Essex County, NJ USPTO Classifications: 451/544, 51/297, 51/303 Tool Categories: metalworking machines : grinders : grinder wheels Assignees: Isaac P. Brown, Jr. - Newark, Essex County, NJ Albert A. Sanborn - Newark, Essex County, NJ Charles P. Zimmerman - Newark, Essex County, NJ Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 22, 1877 Granted: Feb. 20, 1877 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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