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US Patent: 491,789
Grindstone, emery-wheel, &c.
Patentee: Dwight F. Walker (exact or similar names) - Philadelphia, PA USPTO Classifications: 125/11.02 Tool Categories: industrial tools : grinding wheels metalworking machines : grinders : sharpening machines : grinding wheels Assignees: None Manufacturer: D. F. Walker - Philadelphia, PA Witnesses: A. P. Jennings John A. Wiedersheim	Patent Dates: Applied: Feb. 08, 1892 Granted: Feb. 14, 1893 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for D. F. Walker

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