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Priority claimed from GB8811604Aexternal-prioritypatent/GB2218696B/en
Priority claimed from PCT/GB1989/000487external-prioritypatent/WO1989011444A2/en
Application filed by Isoworth LtdfiledCriticalIsoworth Ltd
Publication of NO904970D0publicationCriticalpatent/NO904970D0/en
Publication of NO904970LpublicationCriticalpatent/NO904970L/en