| US Patent: 642,313 
 | 
| Hinge-mortising machine | 
| 
| Patentees: |  
 | Frank W. Lindgren (exact or similar names) - Rockford, IL |  | Levin Faust (exact or similar names) - Rockford, IL |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
 | 
| Patent Dates: |  
| Granted: | Jan. 30, 1900 |  USPTO (New site tip)
 Google Patents
 Report data errors or omissions to steward 
                        Jeff Joslin
 
 | 
| 
| Description: |  | The co-inventors were partners in the firm of Mechanics Machine Co. |  |