| US Patent: 2,448,106 
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| Thread Checking Apparatus | 
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| Patentees: |  
 | Ivan Waldemar Mannerbrink (exact or similar names) - Goteborg,  Sweden |  | Johan Ludwig Sandström (exact or similar names) - Goteborg,  Sweden |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Aug. 09, 1944 |  
| Granted: | Aug. 31, 1948 |  USPTO (New site tip)
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                        Joel Havens
 
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| Description: |  | Howson & Howson - patent attorneys 
Application in Sweden 12 Aug 1943. |  |