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US Patent: 389,480
Expanding Mandrel
Patentee: John Massett (exact or similar names) - North Tarrytown, Westchester County, NY USPTO Classifications: 384/249, 403/370, 82/169 Tool Categories: metalworking tools : mandrels and arbors Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 19, 1888 Granted: Sep. 11, 1888 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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