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Publication date
Priority claimed from GB878728530Aexternal-prioritypatent/GB8728530D0/en
Priority claimed from PCT/GB1988/001059external-prioritypatent/WO1989005555A1/en
Application filed by British Broadcasting CorpfiledCriticalBritish Broadcasting Corp
Application grantedgrantedCritical
Publication of ATE102422T1publicationCriticalpatent/ATE102422T1/en