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US Patent: 642,310
Automatically Opening or Closing Die
Patentee:
Franklin A. Errington (exact or similar names) - New York, NY

USPTO Classifications:
408/147

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: Nov. 17, 1898
Granted: Jan. 30, 1900

Patent Pictures:
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