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US Patent: 1,719,230
Thread-rolling machine
Patentee:
Charles D. McDonald (exact or similar names) - Chicago, IL

USPTO Classifications:
192/125B, 72/103, 72/250

Tool Categories:

Assignees:
McDonald Machine Co. - Chicago, IL

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jun. 21, 1928
Granted: Jul. 02, 1929

Patent Pictures:
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