| US Patent: 57,205 
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| Improved saw-toothing machine | 
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| Patentee: |  |
 | Adam Sowden (exact or similar names) - Cincinnati, OH |  
 
| USPTO Classifications: |  | 76/29 |  
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Granted: | Aug. 14, 1866 |  USPTO (New site tip)
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                        Jeff Joslin
 
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| Description: |  | We could not determine what the inventor was doing at the time this patent was issued. By 1867 he was partner in saw-making firm Ritter, Hogan & Sowden, which became Hogan & Sowden by 1874. |  |