Number | Date | Country | Kind |
---|---|---|---|
95-0598 | Mar 1995 | SEX |
Number | Name | Date | Kind |
---|---|---|---|
3587151 | Nystrom | Jun 1971 | |
4219292 | Hoffmann et al. | Aug 1980 | |
4363576 | Zweekly | Dec 1982 | |
4993890 | Tukala et al. | Feb 1991 | |
5135337 | Adamson | Aug 1992 | |
5163490 | Meis | Nov 1992 |