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| Withdrawn Patents | |
| Grant Date | Patent Number |
| 1993-09-14 | 5,243,824 |
| 1993-09-14 | 5,244,151 |
| 1993-09-14 | 5,244,540 |
| 1993-09-14 | 5,245,197 |
| 1993-09-14 | 5,245,426 |
| 1993-09-14 | 5,245,435 |
| 1993-09-14 | 5,245,540 |
| 1993-09-14 | 5,245,567 |
| 1993-09-14 | 5,245,670 |
| 1993-09-14 | 5,245,673 |
| 1993-09-14 | 5,245,685 |