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US Patent: 830,727
Combined Square, Bevel and Protractor
Patentee: Edwin H. Long (exact or similar names) - Derby, CT USPTO Classifications: 33/426 Tool Categories: layout tools : squares layout tools : bevels layout tools : protractors Assignees: None Manufacturer: Not known to have been produced Witnesses: C. M. Newman Ruth Raymond	Patent Dates: Applied: Jul. 06, 1905 Granted: Sep. 11, 1906 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This is a pair of interlocking squares, hinged at their corners.

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