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US Patent: 253,266
Screw Nut
Patentee: Samuel Darling (exact or similar names) - Providence, RI USPTO Classifications: 470/176, 74/424.71, 74/441, 82/110 Tool Categories: specialty machines : nut or bolt making machines Assignees: None Manufacturer: Not known to have been produced Witnesses: H. R. Davis C. H. Mathewson	Patent Dates: Applied: Oct. 29, 1881 Granted: Feb. 07, 1882 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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