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Priority claimed from PCT/FI1990/000026external-prioritypatent/WO1990008917A1/en
Application filed by Ahlstroem OyfiledCriticalAhlstroem Oy
Priority to FI913291ApriorityCriticalpatent/FI93672C/sv
Publication of FI913291A0publicationCriticalpatent/FI913291A0/sv
Publication of FI93672BpublicationCriticalpatent/FI93672B/sv
Application grantedgrantedCritical
Publication of FI93672CpublicationCriticalpatent/FI93672C/sv