Number | Date | Country | Kind |
---|---|---|---|
3937855 | Nov 1989 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2142003 | Morgelin | Dec 1938 | |
2755533 | Miller | Jul 1956 | |
3174617 | Noffsinger | Mar 1965 | |
3491402 | Shindo et al. | Jan 1970 | |
3742863 | Rosenberger, Jr. | Jul 1973 | |
4200963 | Kamfe et al. | May 1980 | |
4330499 | von und zu Aufsess et al. | May 1982 | |
4614011 | Nicholas et al. | Sep 1986 | |
4890365 | Langer | Jan 1990 |