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US Patent: 420,616
Expanding Lathe Mandrel
Patentee: Latham H. Brightman (exact or similar names) - Cleveland, Cuyahoga County, OH 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: Mar. 30, 1889 Granted: Feb. 04, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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