| US Patent: 659,368 
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| Truing Gage | 
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| Patentees: |  
 | John E. Haberlin (exact or similar names) - Bridgeport, CT |  | William R. Haberlin (exact or similar names) - Bridgeport, CT |  | Timothy F. Hayes (exact or similar names) - Bridgeport, CT |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Jan. 03, 1900 |  
| Granted: | Oct. 09, 1900 |  USPTO (New site tip)
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                        Joel Havens
 
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| Description: |  | A. M. Wooster - patent attorney |  |