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US Patent: 169,080
Machines for Cutting Screw Taps
Patentee: Henry E. Boyd (exact or similar names) - McKeesport, Allegheny County, PA USPTO Classifications: 409/69 Tool Categories: metalworking machines : metal threading machines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 21, 1875 Granted: Oct. 26, 1875 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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