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US Patent: 272,480
Apparatus for Grinding Screws
Patentee:
Henry A. Rowland (exact or similar names) - Baltimore, MD

USPTO Classifications:
451/476, 451/557, 451/905, 74/424.71

Tool Categories:
metalworking machines : grinders : grinding fixtures

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Dec. 15, 1882
Granted: Feb. 20, 1883

Patent Pictures:
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