Number | Date | Country | Kind |
---|---|---|---|
1-225765 | Aug 1989 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3819769 | Pirot | Jun 1974 | |
4134951 | Dow et al. | Jan 1979 |
Number | Date | Country |
---|---|---|
0244486 | Nov 1987 | EPX |
0262230 | Apr 1988 | EPX |
Entry |
---|
Database WPIL, accesion No. 89-329610 (45) Derwent Publ. Ltd. 1989. |