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US Patent: 642,309
Automatically Opening or Closing Die for Cutting Screw Threads, &c.
Patentee: Franklin A. Errington (exact or similar names) - New York, NY USPTO Classifications: 408/74, 470/46, 470/74 Tool Categories: metalworking tools : taps and dies metalworking tools : tap and die holders Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 24, 1897 Granted: Jan. 30, 1900 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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