| Number | Name | Date | Kind |
|---|---|---|---|
| D243578 | Danat | Mar 1977 | |
| D250444 | Danet et al. | Dec 1978 | |
| D314492 | Weller et al. | Feb 1991 | |
| D327817 | Paullin | Jul 1992 | |
| D337242 | Steinfels, III | Jul 1993 | |
| D344659 | Hsu | Mar 1994 | |
| D349216 | Steinfels, III | Aug 1994 | |
| D352211 | Rucks | Nov 1994 | |
| D363855 | Van Blankenburg | Nov 1995 | |
| D369114 | Davidov | Apr 1996 | |
| D369529 | Blankenburg et al. | May 1996 | |
| D370836 | Van Blankenburg | Jun 1996 | |
| D372402 | Van Blankenburg | Aug 1996 | |
| 5511685 | Nelson | Apr 1996 |