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US Patent: 162,392
Improvement in saw-sharpening machines
Patentee: John L. Knowlton (exact or similar names) - Sharon Hill, PA USPTO Classifications: 76/41, 76/50, 76/50.2 Tool Categories: metalworking machines : grinders : sharpening machines : saw sharpening machines Assignees: None Manufacturer: John L. Knowlton - Sharon Hill, PA Witnesses: George S. Patchel Henry McAllister	Patent Dates: Applied: Feb. 05, 1875 Granted: Apr. 20, 1875 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Knowlton, Smith & Co.

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