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US Patent: 990,373
Planer-knife sharpener
Patentee: Harrison J. Mitchell (exact or similar names) - Beloit, WI USPTO Classifications: 451/212, 451/421 Tool Categories: woodworking machines : woodworking machine parts or accessories : woodworking machine sharpening mechanisms Assignees: None Manufacturer: Berlin Machine Works - Beloit, WI P. B. Yates Machine Co. - Beloit, WI Witnesses: T. A. Horstmann L. A. Ross	Patent Dates: Applied: Mar. 14, 1910 Granted: Apr. 25, 1911 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Berlin Machine Works Vintage Machinery entry for P. B. Yates Machine Co.

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