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US Patent: 409,441
Machine for Dressing the Ends of Screw Blanks
Patentee: George E. Witherell (exact or similar names) - Hartford, Hartford County, CT USPTO Classifications: 470/86, 82/125 Tool Categories: specialty machines : nut or bolt making machines Assignees: Hartford Machine Screw Co. - Hartford, Hartford County, CT Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 09, 1889 Granted: Aug. 20, 1889 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Hartford Machine Screw Co.

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