| US Patent: 608,628 
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| Wrench | 
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| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Mar. 28, 1898 |  
| Granted: | Aug. 09, 1898 |  
 
USPTO (New site tip)| Patent Pictures: |  |  |  | Ole Wigtil patent August 9, 1898 |  Google Patents
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                        Stan Schulz
 
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| Description: |  | A screw-adjusted pressure plate in the movable jaw forces teeth inside the movable jaw to engage with rack teeth on the main shank.  There are nut and pipe jaws on both the fixed and jaw faces. |  |