| Number | Name | Date | Kind |
|---|---|---|---|
| 5546162 | Michlin et al. | Aug 1996 | A |
| 6061537 | Nakajima et al. | May 2000 | A |
| 6188856 | Sato | Feb 2001 | B1 |
| 6771918 | Tatsumi | Aug 2004 | B2 |
| 7116931 | Yamada et al. | Oct 2006 | B2 |
| 7184693 | Choi et al. | Feb 2007 | B2 |
| 20050089338 | Hoshi et al. | Apr 2005 | A1 |
| 20070237542 | Daniels | Oct 2007 | A1 |
| Number | Date | Country |
|---|---|---|
| 300347860 | Mar 2004 | KR |
| 300426685 | Oct 2006 | KR |
| 300426686 | Oct 2006 | KR |