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US Patent: 141,299
Screw Cutting Machines
Patentee:
Calrb C. Walworth (exact or similar names) - Boston, Suffolk County, MA

USPTO Classifications:
408/136, 408/138, 470/96

Tool Categories:
metalworking machines : metal lathes : screwcutting lathes

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Feb. 27, 1873
Granted: Jul. 29, 1873

Patent Pictures:
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