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Priority claimed from GB868605649Aexternal-prioritypatent/GB8605649D0/en
Application filed by Boc Group PlcfiledCriticalBoc Group Plc
Priority claimed from EP87301516Aexternal-prioritypatent/EP0237216B1/de
Application grantedgrantedCritical
Publication of ATE63731T1publicationCriticalpatent/ATE63731T1/de