| US Patent: 1,575,558 
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| Centreless Grinding Machine | 
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| Patentees: |  
 | Sol Einstein (exact or similar names) - Cincinnati, Hamilton County, OH |  | Lester F. Nenninger (exact or similar names) - Cincinnati, Hamilton County, OH |  | Walter D. Archea (exact or similar names) - Norwood, Hamilton County, OH |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Jan. 18, 1924 |  
| Granted: | Mar. 02, 1926 |  USPTO (New site tip)
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                        Joel Havens
 "Vintage Machinery" entry for Cincinnati Milling Machine Co.
 
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