Number | Date | Country | Kind |
---|---|---|---|
947/99 | May 1999 | CH |
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---|---|---|---|
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Number | Date | Country |
---|---|---|
4034459 | May 1992 | DE |
9833837 | Aug 1998 | WO |
Entry |
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R.-E. Grützner et al., Kunststoffe 82, (1992) pp. 284-288. |
S. Fakirov et al., Kunststoffe 74, (1984), pp. 218-221. |