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|---|---|---|---|
| 1 | US20020052498 | 10 | US20040157856 |
| 2 | US20030007941 | 11 | US20050053572 |
| 3 | US20060009430 | 12 | US20060052405 |
| 4 | US20060009427 | 13 | US20050123577 |
| 5 | US20050118282 | 14 | US6447762 |
| 6 | US20050085467 | 15 | US20040071647 |
| 7 | US20060009429 | 16 | US20050277699 |
| 8 | US20030073616 | 17 | US20050244362 |
| 9 | EP0279010 | 18 | US4529587 |