| Number | Name | Date | Kind |
|---|---|---|---|
| D229738 | Wallance | Jan 1974 | S |
| 3911578 | Ushkow et al. | Oct 1975 | A |
| D291046 | Johnson | Jul 1987 | S |
| D307095 | Juergens | Apr 1990 | S |
| D388286 | Fox | Dec 1997 | S |
| D413772 | Durbin | Sep 1999 | S |
| D422851 | Joergensen | Apr 2000 | S |
| D482939 | Lillelund et al. | Dec 2003 | S |
| D491419 | White et al. | Jun 2004 | S |
| D501374 | Crowley | Feb 2005 | S |
| D511645 | Fort et al. | Nov 2005 | S |
| D551032 | Lion et al. | Sep 2007 | S |
| D552939 | McRorie, III | Oct 2007 | S |
| D563737 | Shane-Schuldt | Mar 2008 | S |
| D584927 | Vendl et al. | Jan 2009 | S |
| D587537 | Vendl et al. | Mar 2009 | S |