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US Patent: 403,529
Expansible Mandrel
Patentee: Francis J. Gay (exact or similar names) - Providence, Providence County, RI USPTO Classifications: 279/2.03, 279/2.12, 279/46.5 Tool Categories: metalworking tools : mandrels and arbors Assignees: Brown & Sharpe Mfg. Co. - Providence, Providence County, RI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 14, 1889 Granted: May 21, 1889 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Brown & Sharpe Mfg. Co

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