| Number | Date | Country | Kind |
|---|---|---|---|
| 30-2010-0026815 | Jun 2010 | KR | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 6380924 | Yee et al. | Apr 2002 | B1 |
| 6791907 | Berhan | Sep 2004 | B2 |
| 6920344 | Jang | Jul 2005 | B2 |
| 6955606 | Taho et al. | Oct 2005 | B2 |
| D514119 | Tseng | Jan 2006 | S |
| 7090582 | Danieli et al. | Aug 2006 | B2 |
| D534182 | Leija et al. | Dec 2006 | S |
| D560686 | Kim | Jan 2008 | S |
| D568903 | Seo | May 2008 | S |
| D581430 | Lee | Nov 2008 | S |