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US Patent: 1,416,952
Ring-grinding machine
Patentee:
Ralph D. Gardner (exact or similar names) - Beloit, WI

USPTO Classifications:
451/261, 451/267

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Dec. 09, 1920
Granted: May 23, 1922

Patent Pictures:
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