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US Patent: 582,225
Mandrel
Patentee: Vernon F. Prentice (exact or similar names) - Worcester, Worcester County, MA USPTO Classifications: 82/168 Tool Categories: metalworking tools : mandrels and arbors Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 10, 1896 Granted: May 11, 1897 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Prentice Bros.

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