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Priority claimed from GB888816273Aexternal-prioritypatent/GB8816273D0/en
Application filed by Marconi Gec LtdfiledCriticalMarconi Gec Ltd
Priority claimed from EP89306917Aexternal-prioritypatent/EP0350323B1/en
Application grantedgrantedCritical
Publication of ATE96943T1publicationCriticalpatent/ATE96943T1/en