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US Patent: 166,490
Machine for Tapping Nuts
Patentee: Samuel L. Worsley (exact or similar names) - Providence, RI USPTO Classifications: 221/178, 408/67, 408/69, 470/167 Tool Categories: specialty machines : nut or bolt making machines metalworking machines : metal threading machines Assignees: American Screw Co. - Providence, RI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 07, 1875 Granted: Aug. 10, 1875 Reissue Information: Reissued as RE7,153 (May 30, 1876) Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for American Screw Co.

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