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| D480141 | Benirschke et al. | Sep 2003 | S |
| 7846189 | Winquist et al. | Dec 2010 | B2 |
| D648027 | Vancelette et al. | Nov 2011 | S |
| 20100217327 | Vancelette et al. | Aug 2010 | A1 |