| Number | Date | Country | Kind |
|---|---|---|---|
| 4 04 07 265 | Dec 2004 | DE | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4215624 | Tobias | Aug 1980 | A |
| 6077050 | Beck | Jun 2000 | A |
| 6155798 | Deininger et al. | Dec 2000 | A |
| 6318238 | Becker et al. | Nov 2001 | B1 |
| 6405634 | Hansen | Jun 2002 | B1 |
| 6443706 | Deininger et al. | Sep 2002 | B1 |
| 6595886 | Forster | Jul 2003 | B1 |
| 6662707 | Stolzer | Dec 2003 | B1 |
| 6663354 | Forster | Dec 2003 | B2 |
| 6701824 | Forster | Mar 2004 | B2 |
| D501860 | Wanschura et al. | Feb 2005 | S |
| D502717 | Wanschura et al. | Mar 2005 | S |