| US Patent: 613,213 
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| Wrench | 
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| Patentee: |  |
 | William F. Murphy (exact or similar names) - Boston, MA |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Jan. 12, 1898 |  
| Granted: | Oct. 25, 1898 |  
 
USPTO (New site tip)| Patent Pictures: |  |  |  | William F. Murphy patent October 28, 1898 |  Google Patents
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                        Stan Schulz
 
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| Description: |  | Turning the handle engages or releases the toothed clamping block that sets the adjustment of the movable jaw. |  |