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US Patent: 189,483
Devices for Fitting and Polishing Cylinders and Rings
Patentee: Milton H. McNair (exact or similar names) - Meadville, Crawford County, PA USPTO Classifications: 269/238, 269/269, 451/242, 451/324, 451/558, 451/902, 82/169 Tool Categories: metalworking tools : mandrels and arbors Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 12, 1876 Granted: Apr. 10, 1877 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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