| Number | Date | Country | Kind |
|---|---|---|---|
| 30-2008-0044993 | Oct 2008 | KR | national |
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|---|---|---|---|
| 3187828 | Ward et al. | Jun 1965 | A |
| 5658026 | Nigro et al. | Aug 1997 | A |
| 6145353 | Doucet | Nov 2000 | A |
| D452807 | Gartner | Jan 2002 | S |
| 6581426 | Bates et al. | Jun 2003 | B2 |
| 6725693 | Yu et al. | Apr 2004 | B2 |
| 6758070 | Yu et al. | Jul 2004 | B2 |
| D495943 | Hentschel et al. | Sep 2004 | S |
| D501131 | Oskamp et al. | Jan 2005 | S |
| D502859 | Peng et al. | Mar 2005 | S |
| D512899 | Oskamp et al. | Dec 2005 | S |
| D533762 | Wright et al. | Dec 2006 | S |
| D533763 | Wright et al. | Dec 2006 | S |