Number | Name | Date | Kind |
---|---|---|---|
2844485 | Struve | Jul 1958 | |
3298847 | Hanke et al. | Aug 1965 | |
3607336 | Jaffe | Sep 1971 | |
4247696 | Shibata et al. | Jan 1981 | |
4579949 | Rochat et al. | Apr 1986 | |
4720305 | Iqbal et al. | Jan 1988 | |
4760144 | Jaffe | Jul 1988 | |
4895948 | Jaffe et al. | Jan 1990 |
Entry |
---|
Derwent Abst. 79-83541B/46 (JP 54130-621). |