| Number | Date | Country | Kind |
|---|---|---|---|
| 001914631-0001 | Sep 2011 | EM | regional |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4505179 | Nelson et al. | Mar 1985 | A |
| 4778424 | Lloyd | Oct 1988 | A |
| 5661922 | Bonomo | Sep 1997 | A |
| 5748080 | Clay | May 1998 | A |
| 6209531 | Boon | Apr 2001 | B1 |
| 6244261 | West, Jr. | Jun 2001 | B1 |
| 6487951 | Petkantchin | Dec 2002 | B1 |
| 6817727 | McFadden | Nov 2004 | B1 |
| 7029353 | Goodman et al. | Apr 2006 | B2 |
| 7285032 | Cha | Oct 2007 | B2 |
| 7849973 | Hikita et al. | Dec 2010 | B2 |
| D671613 | Tabb | Nov 2012 | S |