| US Patent: 509,851 
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| Tool Holder | 
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| Patentee: |  |
 | Horace E. Britton (exact or similar names) - Stoughton, MA |  
 
 
 
 
 
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| Patent Dates: |  
| Applied: | Aug. 14, 1893 |  
| Granted: | Nov. 28, 1893 |  USPTO (New site tip)
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                        Russ Allen.
 
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| Description: |  | Improved jaw design to prevent the tool being held from being driven too far into the handle during use. The socket has a pin inserted in the bottom of the jaw passage instead of depending on the shoulder formed by the jaws. |  |