| US Patent: 950,222 
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| Tool Holder | 
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| Patentees: |  
 | Charles J. Cluley (exact or similar names) - Coventry, Warwickshire County,  England |  | John W. Raby (exact or similar names) - Coventry, Warwickshire County,  England |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Nov. 20, 1908 |  
| Granted: | Feb. 22, 1910 |  USPTO (New site tip)
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                        Joel Havens
 
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