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US Patent: 195,713
Screw-Cutting Dies
Patentee: M. Carlyle Johnson (exact or similar names) - Hartford, Hartford County, CT USPTO Classifications: 408/182, 408/184, 470/207 Tool Categories: metalworking tools : tap and die holders Assignees: M. Carlyle Johnson - Hartford, Hartford County, CT William N. Woodruff - Hartford, Hartford County, CT Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 21, 1877 Granted: Oct. 02, 1877 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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