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| Title | Date |
|---|---|
| (86) PCT Filing Date | 1991-10-03 |
| (85) National Entry | 1992-04-08 |
| (87) PCT Publication Date | 1992-04-16 |
| Examination Requested | 1998-08-06 |
| (45) Issued | 2003-05-06 |
| Expired | 2011-10-03 |