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| Withdrawn Patents | |
| Grant Date | Patent Number |
| 1992-12-08 | 5,169,187 |
| 1992-12-08 | 5,169,490 |
| 1992-12-08 | 5,169,492 |
| 1992-12-08 | 5,169,507 |
| 1992-12-08 | 5,169,807 |
| 1992-12-08 | 5,169,917 |
| 1992-12-08 | 5,170,090 |
| 1992-12-08 | 5,170,143 |
| 1992-12-08 | 5,170,145 |
| 1992-12-08 | 5,170,282 |
| 1992-12-08 | 5,170,316 |
| 1992-12-08 | 5,170,324 |
| 1992-12-08 | 5,170,408 |
| 1992-12-08 | 5,170,478 |