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| Withdrawn Patents | |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 |