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US Patent: 820,311
Square and Level
Patentee: Emanuel Oehrle (exact or similar names) - Omaha, NE USPTO Classifications: 33/341, 33/419, 33/420 Tool Categories: layout tools : squares layout tools : levels layout tools : protractors Assignees: None Manufacturer: Not known to have been produced Witnesses: D. O. Barnell F. R. Heft L. C. Sharp J. M. Shramek	Patent Dates: Applied: Aug. 01, 1905 Granted: May 08, 1906 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This framing square provides a pivoting level, connected to the square with a protractor scale.

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