| US Patent: 2,994,237 
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| Tooth Forming Tool | 
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| Patentees: |  
 | Harry Pelphrey, deceased (Estate of) (exact or similar names) - Detroit, Wayne County, MI |  | Lillian Pelphrey, Administratrix (exact or similar names) - Detroit, Wayne County, MI |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Aug. 09, 1957 |  
| Granted: | Aug. 01, 1961 |  USPTO (New site tip)
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                        Joel Havens
 "Vintage Machinery" entry for Michigan Tool Co.
 
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| Description: |  | Continuation of application of 09 Aug., 1957. This application 04 Oct., 1960. |  |