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US Patent: 639,035
Chuck for emery-wheels
Patentee:
Gilbert Hart - Detroit, MI

USPTO Classifications:
451/548

Tool Categories:
industrial tools : grinding wheels
metalworking machines : grinders : sharpening machines : grinding wheels

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. A. Ballou
Frank H. Whelden

Patent Dates:
Applied: Jul. 01, 1899
Granted: Dec. 12, 1899

Patent Pictures:
USPTO pdf tiff
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