| Number | Name | Date | Kind |
|---|---|---|---|
| D130824 | Jobst | Dec 1941 | |
| D276193 | Tanabe et al. | Nov 1984 | |
| D315060 | Purushothaman | Mar 1991 | |
| D328392 | Holstein, II et al. | Aug 1992 | |
| D347736 | Schneider et al. | Jun 1994 | |
| D360760 | Halm | Aug 1995 | |
| D410788 | Rangel et al. | Jun 1999 | |
| D412064 | Achepohl et al. | Jul 1999 | |
| D416685 | Overthun | Nov 1999 | |
| 5781958 | Meessmann et al. | Jul 1998 | |
| 5933906 | Rackley | Aug 1999 |