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| Number | Date | Country | |
|---|---|---|---|
| Parent | 09684726 | Oct 2000 | US |
| Child | 10147669 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 11888108 | Jul 2007 | US |
| Child | 29335129 | US | |
| Parent | 10147669 | Jul 2002 | US |
| Child | 11888108 | US |