US Patent: 3,509,667 
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| Method of grinding welded rail
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	        Patentee:
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 | Karl L. Lindmark (exact or similar names) - Rockford, IL |  
 
 
 
 
 
| Manufacturer: |  
| Not known to have been produced |  
 
 
 
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        Patent Dates:
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| Applied: | 
Nov. 21, 1966 | 
 
| Granted: | 
May 05, 1970 | 
 
 
 
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                        Jeff Joslin Vintage Machinery entry for Fenlind Engineering Co.; Rock Mill, Inc. 
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        Description: |  
| The inventor had co-founded milling machine maker Fenlind, Inc. This patent implies that Lindmark had left Fenlind by 1966. See also patent 3,566,546, which was part of the original 1966 patent application. |  
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