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| Number | Date | Country | |
|---|---|---|---|
| Parent | 11281883 | Nov 2005 | US |
| Child | 29344579 | US | |
| Parent | 10033575 | Dec 2001 | US |
| Child | 10866477 | US | |
| Parent | 09434026 | Nov 1999 | US |
| Child | 10033575 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 10866477 | Jun 2004 | US |
| Child | 11281883 | US |