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US Patent: 233,821
Machine for Cutting Screw Threads
Patentee:
John H. Vinton (exact or similar names) - Bridgeport, Fairfield County, CT

USPTO Classifications:
144/130, 409/69, 470/181

Tool Categories:
metalworking machines : metal threading machines

Assignees:
Frank Armstrong - Bridgeport, Fairfield County, CT

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Nov. 12, 1879
Granted: Oct. 26, 1880

Patent Pictures:
USPTO (New site tip)
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