| Number | Date | Country | Kind |
|---|---|---|---|
| 000991096 | Aug 2008 | EM | regional |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4377214 | Hansen et al. | Mar 1983 | A |
| 4542799 | Komoto | Sep 1985 | A |
| 4619337 | Behrend et al. | Oct 1986 | A |
| 4872119 | Kajimoto | Oct 1989 | A |
| 5050694 | Liang | Sep 1991 | A |
| 5874694 | Ruedisueli | Feb 1999 | A |
| 6246018 | Schink | Jun 2001 | B1 |
| D458553 | Dwertmann | Jun 2002 | S |
| D458859 | Dwertmann | Jun 2002 | S |
| 6633007 | Luchinger et al. | Oct 2003 | B1 |
| 6777625 | Oldendorf | Aug 2004 | B2 |
| 6844507 | Leisinger et al. | Jan 2005 | B2 |
| D506941 | Leisinger et al. | Jul 2005 | S |
| D514966 | Leisinger et al. | Feb 2006 | S |
| 6995323 | Kunzi et al. | Feb 2006 | B2 |
| D523365 | Kajimoto et al. | Jun 2006 | S |
| D526919 | Marmier et al. | Aug 2006 | S |
| 7232963 | Leisinger et al. | Jun 2007 | B2 |
| 7256357 | Kesselman | Aug 2007 | B1 |
| 7423226 | Rotach et al. | Sep 2008 | B2 |
| D587608 | Marmier | Mar 2009 | S |