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US Patent: 211,742
Thread Cutting Tool for Metal Screw Machines
Patentee:
Allen Johnson (exact or similar names) - Ottumwa, Wapello County, IA

USPTO Classifications:
408/118, 470/181, 470/83

Tool Categories:
metalworking machines : screw machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Nov. 08, 1878
Granted: Jan. 28, 1879

Patent Pictures:
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