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| D486807 | Takayama et al. | Feb 2004 | S |
| 6743030 | Lin et al. | Jun 2004 | B2 |
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| 6860609 | Olson et al. | Mar 2005 | B2 |
| D512404 | Yang | Dec 2005 | S |
| 20050173276 | Hsu | Aug 2005 | A1 |