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Priority claimed from SE8103749Aexternal-prioritypatent/SE436052B/en
Priority claimed from SE8103748Aexternal-prioritypatent/SE436051B/en
Priority claimed from PCT/SE1982/000215external-prioritypatent/WO1982004454A1/en
Application filed by Ifm Akustikbyran AbfiledCriticalIfm Akustikbyran Ab
Publication of FI830479LpublicationCriticalpatent/FI830479L/en
Publication of FI830479A0publicationCriticalpatent/FI830479A0/en