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US Patent: 464,568
Screw Cutting Die
Patentee:
Charles A. Johnson (exact or similar names) - Hartford, Hartford County, CT

USPTO Classifications:
408/188, 411/418

Tool Categories:
metalworking tools : taps and dies

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Feb. 02, 1891
Granted: Dec. 08, 1891

Patent Pictures:
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