| Number | Name | Date | Kind |
|---|---|---|---|
| 4570404 | Knudson | Feb 1986 | A |
| 6315489 | Watanabe | Nov 2001 | B1 |
| 6402419 | Watanabe | Jun 2002 | B1 |
| 6830405 | Watanabe | Dec 2004 | B2 |
| 20010045075 | Watanabe | Nov 2001 | A1 |
| 20020046536 | Hotta | Apr 2002 | A1 |
| 20050102944 | Hikai | May 2005 | A1 |
| Number | Date | Country |
|---|---|---|
| 2001-032500 | Feb 2001 | JP |
| 2005-232710 | Sep 2005 | JP |
| 2007-085053 | Apr 2007 | JP |