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US Patent: 418,493
Combined File and Try Square
Patentees: John W. Boughton (exact or similar names) - Philadelphia, PA John M. Snidow (exact or similar names) - Big Stony Creek, VA USPTO Classifications: 33/418, 33/495, 7/163 Tool Categories: layout tools : squares : try squares metalworking tools : files Assignees: John W. Boughton - Philadelphia, PA Manufacturer: Not known to have been produced Witnesses: John A. Wiedersheim A. P. Jennings F. G. Thrasher T. T. Phlegar	Patent Dates: Applied: Sep. 06, 1889 Granted: Dec. 31, 1889 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen.

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