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Priority claimed from NO853719Aexternal-prioritypatent/NO853719L/en
Priority claimed from NO863763Aexternal-prioritypatent/NO159351C/en
Application filed by Njal UnderhaugfiledCriticalNjal Underhaug
Application grantedgrantedCritical
Publication of ATE61959T1publicationCriticalpatent/ATE61959T1/en