| US Patent: 285,796 
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| Blank For Monkey Wrenches Improvements in Blanks for Forging the Hammer-Jaws of Monkey Wrenches
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| Patentee: |  |
 | Matthew E. Campfield (exact or similar names) - Cleveland, OH |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Apr. 12, 1883 |  
| Granted: | Oct. 02, 1883 |  
 
USPTO (New site tip)| Patent Pictures: |  |  |  | Matthew E. Campfield patent October 2, 1883 |  Google Patents
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                        Stan Schulz
 
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| Description: |  | The blank has extra metal at the ends that form the hammer poll and extended jaw for the fixed jaw and shank of a monkey wrench.
Note: One assignee name likely was mis-read at the patent office.  C.G. Sutliff was Campfield's partner.  The firm passed to Cleveland Screw Wrench Co. in 1884, when Mr. Campfield moved to Sterling, OH. |  |