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US Patent: 139,142
Improvement in edging-machines
Patentees: Otto H. Gronberg (exact or similar names) - Ferrysburg, MI William M. Ferry (exact or similar names) - Grand Haven, MI USPTO Classifications: 83/508.3 Tool Categories: woodworking machines : circular saws : circular ripsaws Assignees: None Manufacturer: Ottawa Iron Works - Ferrysburgh, MI Witnesses: Unknown	Patent Dates: Applied: Apr. 08, 1873 Granted: May 20, 1873 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Ottawa Iron Works

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