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US Patent: 97,691
Improved machine for swaging threads on screws
Patentee:
Treat T. Prosser (exact or similar names) - Chicago, IL

USPTO Classifications:
72/104, 72/69

Tool Categories:
metalworking machines : metal swaging machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. Waller
W. S. Weller
Patent Dates:
Granted: Dec. 07, 1869

Patent Pictures:
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