| US Patent: 79,665 
 | 
| Wrench Improvement in Pipe-Wrenches
 | 
| 
| Patentee: |  |
 | John Madden (exact or similar names) - Cleveland, OH |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
 | 
| Patent Dates: |  
| Granted: | Jul. 07, 1868 |  
 
USPTO (New site tip)| Patent Pictures: |  |  |  | John Madden  Pat. July 7, 1868 |  Google Patents
 Report data errors or omissions to steward 
                        Stan Schulz
 
 | 
| 
| Description: |  | The patent is for a supplementary pipe jaw that is applied to the outer jaw of a monkey wrench. |  |