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| Withdrawn Patents | |
| Grant Date | Patent Number |
| 1993-12-21 | 5,271,510 |
| 1993-12-21 | 5,271,637 |
| 1993-12-21 | 5,271,738 |
| 1993-12-21 | 5,271,933 |
| 1993-12-21 | 5,271,937 |
| 1993-12-21 | 5,271,938 |
| 1993-12-21 | 5,272,123 |
| 1993-12-21 | 5,272,251 |
| 1993-12-21 | 5,272,515 |
| 1993-12-21 | 5,272,557 |
| 1993-12-21 | 5,272,575 |
| 1993-12-21 | 5,272,750 |
| 1993-12-21 | 5,272,759 |