Number | Date | Country | Kind |
---|---|---|---|
8924755 | Nov 1989 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
4882353 | Niewohner et al. | Nov 1989 |
Number | Date | Country |
---|---|---|
0253257 | Jan 1988 | EPX |
0270929 | Jun 1988 | EPX |
0315009 | May 1989 | EPX |
Entry |
---|
Niewoehner et al., CA., 111, 232575e, 1989 (Abstract of EP 315,009). |