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US Patent: 497,632
Automatic Chuck
Patentee:
Conrad M. Conradson (exact or similar names) - Madison, Dane County, WI

USPTO Classifications:
279/55

Tool Categories:
metalworking machines : screw machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Nov. 28, 1892
Granted: May 16, 1893

Patent Pictures:
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"Vintage Machinery" entry for Gisholt Machine Co.

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