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US Patent: 480,435
Lathe Mandrel
Patentee: John H. McGraw (exact or similar names) - Oswego, Oswego County, NY USPTO Classifications: 82/169 Tool Categories: metalworking tools : mandrels and arbors Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 31, 1891 Granted: Aug. 09, 1892 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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