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| D276097 | Ditgen | Oct 1984 | S |
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| D476485 | Mulder et al. | Jul 2003 | S |
| 20050091770 | Mourad et al. | May 2005 | A1 |
| 20050283928 | Grez et al. | Dec 2005 | A1 |
| Number | Date | Country |
|---|---|---|
| 2278537 | Dec 1994 | GB |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 29247841 | Jul 2006 | US |
| Child | 29276123 | US |