| Number | Name | Date | Kind |
|---|---|---|---|
| 3220024 | Nelson | Nov 1965 | A |
| 3262133 | Beitzel | Jul 1966 | A |
| 3548426 | Helton | Dec 1970 | A |
| 4724559 | Bly et al. | Feb 1988 | A |
| 4993089 | Solomon et al. | Feb 1991 | A |
| 5448791 | Brown | Sep 1995 | A |
| 5463784 | Alpern | Nov 1995 | A |
| 5640726 | Fichner-Rathus | Jun 1997 | A |
| 6138301 | Battiston | Oct 2000 | A |
| 6401280 | Baker | Jun 2002 | B1 |
| 6519794 | Aarestad et al. | Feb 2003 | B1 |
| 6560794 | Allen et al. | May 2003 | B2 |
| 7103928 | Childs | Sep 2006 | B1 |
| 7197779 | Shalikar | Apr 2007 | B2 |
| 7373679 | Miller | May 2008 | B2 |
| 20050262632 | Wu | Dec 2005 | A1 |
| 20060195986 | Hakamiun et al. | Sep 2006 | A1 |
| 20070083994 | Miller | Apr 2007 | A1 |