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US Patent: 177,018
Improvement in sanding-machines
Patentees: Henry C. Knowlton (exact or similar names) - Gardner, MA Augustus Knowlton (exact or similar names) - Gardner, MA Oliver Sawyer (exact or similar names) - Winchendon, MA USPTO Classifications: 451/301, 451/302 Tool Categories: woodworking machines : sanding machines Assignees: None Manufacturer: Not known to have been produced Witnesses: John Heywood Thatcher B. Dunn	Patent Dates: Applied: Oct. 19, 1875 Granted: May 02, 1876 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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