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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:
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