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US Patent: 257,220
Expanding Mandrel
Patentee: Joseph Harrison (exact or similar names) - Manchester, Lancaster County, England USPTO Classifications: 82/169 Tool Categories: metalworking tools : mandrels and arbors Assignees: Henry Bernoulli Barlow - Manchester, Lancaster County, England Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 04, 1882 Granted: May 02, 1882 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens
Description: Patented in England, 09 Mar., 1881.

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