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US Patent: 290,236
Machine for Sharpening Mowing Machine Knives
Patentee:
Robert R. Isaac (exact or similar names) - Trenton, Oneida County, NY

USPTO Classifications:
451/349

Tool Categories:
knives and cutters : sharpening apparatus

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jul. 02, 1883
Granted: Dec. 18, 1883

Patent Pictures:
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