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| Number | Date | Country | |
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| Parent | 13194666 | Jul 2011 | US |
| Child | 29441022 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 11284931 | Nov 2005 | US |
| Child | 13194666 | US | |
| Parent | 12797043 | Jun 2010 | US |
| Child | 11284931 | US |