| Withdrawn Patents |
| Grant Date | Patent Number |
| 1997-06-17 | 5,638,647 |
| 1997-06-17 | 5,638,654 |
| 1997-06-17 | 5,639,107 |
| 1997-06-17 | 5,639,190 |
| 1997-06-17 | 5,639,241 |
| 1997-06-17 | 5,639,381 |
| 1997-06-17 | 5,639,406 |
| 1997-06-17 | 5,639,456 |
| 1997-06-17 | 5,639,479 |
| 1997-06-17 | 5,639,534 |
| 1997-06-17 | 5,639,610 |
| 1997-06-17 | 5,639,628 |
| 1997-06-17 | 5,639,636 |
| 1997-06-17 | 5,639,646 |
| 1997-06-17 | 5,639,703 |
| 1997-06-17 | 5,639,709 |
| 1997-06-17 | 5,639,721 |
| 1997-06-17 | 5,639,762 |
| 1997-06-17 | 5,639,898 |
| 1997-06-17 | 5,640,050 |
| 1997-06-17 | 5,640,091 |
| 1997-06-17 | 5,640,094 |
| 1997-06-17 | 5,640,321 |
| 1997-06-17 | 5,640,397 |
| 1997-06-17 | 5,640,633 |
| 1997-06-17 | 5,640,665 |
| 1997-06-17 | 5,640,671 |
