| US Patent: 431,081 
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| Nut Wrench | 
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| Patentee: |  |
 | Benjamin F. Stockford (exact or similar names) - South Bend, IN |  
 
 
 
 
 
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| Patent Dates: |  
| Applied: | Aug. 27, 1889 |  
| Granted: | Jul. 01, 1890 |  
 
USPTO (New site tip)| Patent Pictures: |  |  |  | Benjamin F. Stockford patent July 1, 1890 |  Google Patents
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                        Stan Schulz
 
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| Description: |  | The patent carries forward and refines the features of Stockford's previous patents.  A spring tends to close the jaws.  A rocking piece in the movable jaw face can disengage the adjustment.  A sliding piece in the base of the movable jaw can set the adjustment.  The prior patents are nos. 281,318 and 306,439. |  |