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US Patent: 491,789
Grindstone, emery-wheel, &c.
Patentee:
Dwight F. Walker - Philadelphia, PA

USPTO Classifications:
125/11.02

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

Assignees:
None

Manufacturer:
Walker Brothers - Philadelphia, PA

Witnesses:
A. P. Jennings
John A. Wiedersheim

Patent Dates:
Applied: Feb. 08, 1892
Granted: Feb. 14, 1893

Patent Pictures: [ 1 | 2 ]
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"Vintage Machinery" entry for Walker Brothers

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