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| Withdrawn Patents | |
| Grant Date | Patent Number |
| 1992-09-15 | 5,146,866 |
| 1992-09-15 | 5,146,919 |
| 1992-09-15 | 5,147,097 |
| 1992-09-15 | 5,147,350 |
| 1992-09-15 | 5,147,488 |
| 1992-09-15 | 5,147,649 |
| 1992-09-15 | 5,147,774 |
| 1992-09-15 | 5,147,804 |
| 1992-09-15 | 5,147,807 |
| 1992-09-15 | 5,147,958 |
| 1992-09-15 | 5,148,305 |