| US Patent: D159,044 
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| Impact Wrench Power Unit | 
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| Patentee: |  |
 | Aileen Bushnell (exact or similar names) - Aurora, IL |  
 
| USPTO Classifications: |  | D8/68 |  
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Oct. 22, 1949 |  
| Granted: | Jun. 20, 1950 |  
 
USPTO (New site tip)| Patent Pictures: |  |  |  | Aileen Bushnell design patent June 20, 1950 |  Google Patents
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                        Stan Schulz
 
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| Description: |  | Design for an electric power impact wrench. 
Design patents nos. D156,319 and D156,320 are cited as references. |  |