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US Patent: 547,188
Expanding Lathe Arbor
Patentee: John P. Simmons (exact or similar names) - San Francisco, San Francisco County, CA 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: Jul. 26, 1894 Granted: Oct. 01, 1895 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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