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| Withdrawn Patents | |
| Grant Date | Patent Number | 
| 1993-07-20 | 5,228,199 | 
| 1993-07-20 | 5,228,278 | 
| 1993-07-20 | 5,228,575 | 
| 1993-07-20 | 5,228,801 | 
| 1993-07-20 | 5,228,935 | 
| 1993-07-20 | 5,229,008 | 
| 1993-07-20 | 5,229,034 | 
| 1993-07-20 | 5,229,098 | 
| 1993-07-20 | 5,229,269 | 
| 1993-07-20 | 5,229,287 | 
| 1993-07-20 | 5,229,330 | 
| 1993-07-20 | 5,229,440 | 
| 1993-07-20 | 5,229,499 | 
| 1993-07-20 | 5,229,778 | 
| 1993-07-20 | 5,229,974 |