| US Patent: 156,204 
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| Improvement in pile-cutters | 
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| Patentee: |  |
 | George H. Cavanagh (exact or similar names) - Boston, MA |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Sep. 17, 1874 |  
| Granted: | Oct. 27, 1874 |  USPTO (New site tip)
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                        Jeff Joslin
 
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| Description: |  | This saw is intended to be mounted on a scow, and its innovation is that it uses a previously-cut pile as a reference point for subsequent cuts, which allows the cuts to be all at the same height without further manual adjustments, even though the water level is changing with the tides. |  |