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Patent number:
Patent Date:
US Patent: 180,869
Devices for Cutting Screw Threads
Patentees:
Eugene E. Green (
exact
or
similar
names) - Portsmouth, Scioto County, OH
John Thomson (
exact
or
similar
names) - Portsmouth, Scioto County, OH
USPTO Classifications:
279/71
,
408/178
,
470/75
Tool Categories:
metalworking tools
:
tap and die holders
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Jul. 06, 1876
Granted:
Aug. 08, 1876
Patent Pictures:
USPTO
(New site tip)
Google Patents
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