| US Patent: 431,525 
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| Combined chamfer-cutter and lathe | 
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| Patentee: |  |
 | Christen Mattison (exact or similar names) - Minneapolis, MN |  
 
| USPTO Classifications: |  | 142/41, 142/48, 142/54, 144/1.1, 144/129, 144/137, 144/138, 144/218, 144/228, 144/3.1, 451/414, 83/810 |  
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Sep. 18, 1889 |  
| Granted: | Jul. 01, 1890 |  USPTO (New site tip)
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                        Jeff Joslin
 
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