| US Patent: 156,602 
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| Ratchet-Drills | 
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| Patentee: |  |
 | Henry Smith (exact or similar names) - Meridan, New Haven County, CT |  
 
 
 
 
 
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| Patent Dates: |  
| Applied: | Oct. 15, 1874 |  
| Granted: | Nov. 03, 1874 |  
 
USPTO (New site tip)| Patent Pictures: |  |  |  | Henry Smith patent November 3, 1874 |  Google Patents
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                        Stan Schulz
 
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| Description: |  | The patent's focus is the structure of  pawl and and toothed collar; the collar splined to the the head which contains the clamping arrangement to hold the drill. |  |