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US Patent: 637,133
Open Die Head
Patentee:
Hermann Kupsch (exact or similar names) - Chicago, Cook County, IL

USPTO Classifications:
408/186, 408/74

Tool Categories:
metalworking tools : tap and die holders

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: May 22, 1899
Granted: Nov. 14, 1899

Patent Pictures:
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