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US Patent: 1,631,247
Gyratory Grinding Machine
Patentee:
Conrad M. Conradson (exact or similar names) - Green Bay, Brown County, WI

USPTO Classifications:
451/271, 451/360

Tool Categories:
metalworking machines : grinders

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jun. 25, 1925
Granted: Jun. 07, 1927

Patent Pictures:
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