| Number | Name | Date | Kind |
|---|---|---|---|
| D247416 | Berman et al. | Mar 1978 | S |
| D258191 | Berman et al. | Feb 1981 | S |
| D268878 | Taylor | May 1983 | S |
| D363578 | Brightbill et al. | Oct 1995 | S |
| D439716 | Wright | Mar 2001 | S |
| D500118 | Flick | Dec 2004 | S |
| D518936 | Yang et al. | Apr 2006 | S |
| D520700 | Plikuhn | May 2006 | S |
| D595914 | Housley | Jul 2009 | S |
| 7766175 | Jadhav et al. | Aug 2010 | B2 |
| D667655 | Goodman et al. | Sep 2012 | S |