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US Patent: 417,174
Machine for cutting square holes
Patentee: Winfield O. Gunckel (exact or similar names) - Terre Haute, IN USPTO Classifications: 144/80 Tool Categories: woodworking machines : joint making machines : mortising machines woodworking machines : wood drilling and boring : mortising machines Assignees: None Manufacturer: Not known to have been produced Witnesses: Edwin S. Gobin S. E. Cotton	Patent Dates: Applied: Jan. 25, 1889 Granted: Dec. 10, 1889 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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