| Number | Date | Country | Kind |
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| 2000-258772 | Aug 2000 | JP |
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| 3504379 | Glick | Apr 1970 | A |
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| 5195188 | Bourdeau et al. | Mar 1993 | A |
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| 5423089 | Chun et al. | Jun 1995 | A |
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| 5708979 | Redwood et al. | Jan 1998 | A |
| 5740555 | Renegar | Apr 1998 | A |
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| Number | Date | Country |
|---|---|---|
| 654 227 | May 1995 | EP |
| 1 064 971 | Jan 2001 | EP |
| 57-121615 | Jul 1982 | JP |
| 60-76966 | May 1985 | JP |
| 11-57107 | Mar 1999 | JP |
| 2000037496 | Feb 2000 | JP |
| 0041777 | Jul 2000 | WO |
| Entry |
|---|
| European Search Report dated Nov. 9, 2001. |