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US Patent: 441,633
Vibrator-attachment for polishing-machines
Patentees: Anson P. Boardman (exact or similar names) - Watertown, WI Joseph B. Bennett (exact or similar names) - Watertown, WI USPTO Classifications: 451/131 Tool Categories: woodworking machines : sanding machines Assignees: Berlin Machine Works - Beloit, WI Manufacturer: Berlin Machine Works - Beloit, WI Witnesses: George Hawkins C. B. Skinner	Patent Dates: Applied: Apr. 10, 1889 Granted: Dec. 02, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Berlin Machine Works

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