| Number | Name | Date | Kind |
|---|---|---|---|
| D272204 | DeBoer | Jan 1984 | |
| D277143 | Helmhodt | Jan 1985 | |
| D279155 | Aronowitz et al. | Jun 1985 | |
| D292655 | Hendrick | Nov 1987 | |
| D309384 | Buhk | Jul 1990 | |
| D320507 | Shields | Oct 1991 | |
| D328199 | Citterio | Jul 1992 | |
| D330478 | Woopman et al. | Oct 1992 | |
| D339927 | Fahnstrom et al. | Oct 1993 | |
| D343740 | Ginat | Feb 1994 | |
| D345259 | Narita | Mar 1994 | |
| D346279 | Stumpf et al. | Apr 1994 | |
| D349621 | Wilson | Aug 1994 | |
| D351070 | Scheper et al. | Oct 1994 | |
| D352181 | Ivicevi | Nov 1994 | |
| D358063 | Larkin | May 1995 | |
| D362973 | Schultz | Oct 1995 | |
| D362974 | Olson et al. | Oct 1995 | |
| D365453 | Newhouse | Dec 1995 | |
| D371683 | Tolleson et al. | Jul 1996 | |
| D380110 | Tortel | Jun 1997 | |
| D390712 | Koepke et al. | Feb 1998 | |
| D391791 | Smith | Mar 1998 | |
| D393755 | Nemeth, Jr. | Apr 1998 | |
| D398163 | Desabta | Sep 1998 | |
| 4451085 | Franck et al. | May 1984 | |
| 4509793 | Wiesmann et al. | Apr 1985 | |
| 4529247 | Stumpf et al. | Jul 1985 | |
| 4861108 | Acton et al. | Aug 1989 | |
| 4911501 | Decker et al. | Mar 1990 | |
| 5382079 | Wilson et al. | Jan 1995 | |
| 5501507 | Hummitzsch | Mar 1996 | |
| 5577807 | Hodge et al. | Nov 1996 | |
| 5599067 | Schuelke et al. | Feb 1997 | |
| 5667277 | Van DeRiet | Sep 1997 |