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US Patent: 157,700
Machines for Threading Bolts
Patentee: Coleman Sellers (exact or similar names) - Philadelphia, PA USPTO Classifications: 29/DIG.101, 29/DIG.102, 29/DIG.55, 29/DIG.68, 29/DIG.91, 408/15, 408/56, 408/68, 470/76 Tool Categories: Assignees: William Sellers - Philadelphia, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 08, 1874 Granted: Dec. 15, 1874 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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