Number | Date | Country | Kind |
---|---|---|---|
1029/99 | Jun 1999 | CH |
Number | Name | Date | Kind |
---|---|---|---|
2909420 | Gysin et al. | Oct 1959 | A |
4260753 | Berrer et al. | Apr 1981 | A |
5118346 | Wehner et al. | Jun 1992 | A |
Number | Date | Country |
---|---|---|
2082533 | May 1993 | CA |
1914014 | Oct 1969 | DE |
149302 | Jul 1981 | DE |
0332578 | Sep 1989 | EP |
0542078 | May 1993 | EP |
Entry |
---|
Derwent Abstr. 1967-07663H [00] for DE 1914014 (1969). |
Derwent Abstr. 1981-71816D [40] for DD 149302 (1981). |