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Priority claimed from SE8402141Aexternal-prioritypatent/SE442035B/en
Application filed by Karl Arne IlvanderfiledCriticalKarl Arne Ilvander
Publication of FI881266ApublicationCriticalpatent/FI881266A/en
Publication of FI881266A0publicationCriticalpatent/FI881266A0/en