| Number | Date | Country | Kind |
|---|---|---|---|
| 30-2011-0020420 | May 2011 | KR | national |
| 30-2011-0020421 | May 2011 | KR | national |
| 30-2011-0020599 | May 2011 | KR | national |
| 30-2011-0020866 | May 2011 | KR | national |
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| D568801 | Machida et al. | May 2008 | S |
| D571705 | Machida et al. | Jun 2008 | S |