US Patent: 820,311 
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| Square and Level
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	        Patentee:
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 | Emanuel Oehrle (exact or similar names) - Omaha, NE |  
 
 
 
 
 
| Manufacturer: |  
| Not known to have been produced |  
 
 
 
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        Patent Dates:
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| Applied: | 
Aug. 01, 1905 | 
 
| Granted: | 
May 08, 1906 | 
 
 
 
USPTO (New site tip) Google Patents 
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                        Ralph Brendler 
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        Description: |  
| This framing square provides a pivoting level, connected to the square with a protractor scale. |  
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