| US Patent: 231,094 
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| File-cutting machine | 
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| Patentee: |  |
 | Treat T. Prosser (exact or similar names) - Chicago, IL |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Apr. 08, 1880 |  
| Granted: | Aug. 10, 1880 |  
 
USPTO (New site tip)| Patent Pictures:
	      
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                        Jeff Joslin
 
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| Description: |  | See the biography of the inventor in the description for patent 15,438. |  |