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US Patent: 425,186
Grinding-machine
Patentee: George J. Ridley (exact or similar names) - Auburn, NY USPTO Classifications: 451/194 Tool Categories: metalworking machines : grinders : sharpening machines Assignees: None Manufacturer: E. F. Allen & Co. - Auburn, NY George J. Ridley - Auburn, NY Witnesses: Charles L. Price A. H. Searing	Patent Dates: Applied: May 15, 1889 Granted: Apr. 08, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for George J. Ridley; E. F. Allen & Co.
Description: The inventor designed this grinder particularly for hollow-grinding razors.

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