| US Patent: 71,953 
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| Improvement in Try Squares and Bevels | 
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| Patentee: |  |
 | Samuel N. Batchelder (exact or similar names) - Prarie Du Chien, WI |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Granted: | Dec. 10, 1867 |  USPTO (New site tip)
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                        Russ Allen.
 
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| Description: |  | Try sqare that utilizes a thumbscrew on the back of the stock to allow the blade to be set and locked at different angles. |  |