| Number | Date | Country | Kind |
|---|---|---|---|
| 2001-037395 | Dec 2001 | JP |
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| 5670014 | Mendelovich et al. | Sep 1997 | A |
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| D421059 | Shimizu | Feb 2000 | S |
| D421461 | Kelders et al. | Mar 2000 | S |
| D424116 | You | May 2000 | S |
| D467280 | Van Zuthem-Maasdam et al. | Dec 2002 | S |