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| Withdrawn Patents | |
| Grant Date | Patent Number | 
| 1993-09-28 | 5,247,943 | 
| 1993-09-28 | 5,248,143 | 
| 1993-09-28 | 5,248,161 | 
| 1993-09-28 | 5,248,194 | 
| 1993-09-28 | 5,248,256 | 
| 1993-09-28 | 5,248,281 | 
| 1993-09-28 | 5,248,444 | 
| 1993-09-28 | 5,248,563 | 
| 1993-09-28 | 5,248,634 | 
| 1993-09-28 | 5,248,654 | 
| 1993-09-28 | 5,248,698 | 
| 1993-09-28 | 5,248,944 | 
| 1993-09-28 | 5,248,966 |