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Priority claimed from SE8506068Aexternal-prioritypatent/SE8506068D0/en
Application filed by Astra Vent AbfiledCriticalAstra Vent Ab
Priority claimed from PCT/SE1986/000547external-prioritypatent/WO1987004019A1/en
Application grantedgrantedCritical
Publication of ATE54230T1publicationCriticalpatent/ATE54230T1/en