| Number | Date | Country | Kind |
|---|---|---|---|
| 9911942 | May 1999 | GB | |
| 9914266 | Jun 1999 | GB |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4946624 | Michael | Aug 1990 | |
| 6013682 | Dalle et al. | Jan 2000 | |
| 6114299 | Hunter et al. | Sep 2000 |
| Number | Date | Country |
|---|---|---|
| 0 285 391 | Oct 1988 | EP |
| 0 356 210 | Feb 1990 | EP |
| 0 544 493 | Jun 1993 | EP |
| 0 661 398 | Jul 1995 | EP |
| 0 789 070 | Aug 1997 | EP |
| 9119037 | Dec 1991 | WO |
| 9511746 | May 1995 | WO |
| 9524460 | Sep 1995 | WO |
| 9615309 | May 1996 | WO |
| 9731997 | Apr 1997 | WO |
| 9731998 | Sep 1997 | WO |
| Entry |
|---|
| International Search Report dated May 8, 2000. |