| Number | Date | Country | Kind |
|---|---|---|---|
| 2006-001639 | Jan 2006 | JP | national |
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| D480764 | Inoue et al. | Oct 2003 | S |
| 6773351 | Brown | Aug 2004 | B2 |
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| D539355 | Fujita | Mar 2007 | S |