| US Patent: 65,532 
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| Improvement in Graduated Bevel Squares | 
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| Patentees: |  
 | Solomon E. Bickford (exact or similar names) - Franklin, NH |  | Frederick Flanders (exact or similar names) - Franklin, NH |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Granted: | Jun. 11, 1867 |  USPTO (New site tip)
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                        Russ Allen.
 
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| Description: |  | Two bladed bevel with one blade with inner and outer scales and the second blade with an indicator for the scales. |  |