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Patent number:
Patent Date:
US Patent: 79,971
Improved screw-threading machine
Patentee:
Ezra Gould (
exact
or
similar
names) - 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
(New site tip)
Google Patents
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