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Priority claimed from NO864260Aexternal-prioritypatent/NO159639C/no
Priority claimed from NO870637Aexternal-prioritypatent/NO160415C/no
Application filed by Halldor SkardfiledCriticalHalldor Skard
Priority claimed from EP87850320Aexternal-prioritypatent/EP0266329B1/de
Application grantedgrantedCritical
Publication of ATE55699T1publicationCriticalpatent/ATE55699T1/de