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US Patent: 79,971
Improved screw-threading machine
Patentee:
Ezra Gould - Newark, NJ

USPTO Classifications:
408/64, 408/65, 470/75, 470/96

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
C. Halsey Canfield
F. H. Gould

Patent Dates:
Granted: Jul. 14, 1868

Patent Pictures:
USPTO pdf tiff
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