| Number | Date | Country | Kind |
|---|---|---|---|
| 002020610 | Apr 2012 | EP | regional |
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| 5647666 | Narholm et al. | Jul 1997 | A |
| D431627 | Etschel et al. | Oct 2000 | S |
| D436647 | Etschel et al. | Jan 2001 | S |
| 6997601 | Feldmeier | Feb 2006 | B2 |
| 8057091 | Tormaschy et al. | Nov 2011 | B2 |