Number | Date | Country | Kind |
---|---|---|---|
8902232 | Jun 1989 | SEX |
Number | Name | Date | Kind |
---|---|---|---|
1852125 | Miessner | Apr 1932 | |
3246229 | Lloyd | Feb 1962 | |
3660787 | Mahmound et al. | May 1972 | |
3745443 | Weil | Jul 1973 | |
3761797 | Spooner | Sep 1973 | |
4791543 | Chadwick et al. | Dec 1988 | |
4795959 | Cooper | Jan 1989 |
Number | Date | Country |
---|---|---|
1203839 | Oct 1965 | DEX |
0930521 | May 1982 | SUX |
Entry |
---|
Derwents Abstract No. J1160 D/35, SU 777782, Nov., 1980. |