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Priority claimed from GB868602230Aexternal-prioritypatent/GB8602230D0/en
Priority claimed from GB08602227Aexternal-prioritypatent/GB2186139A/en
Application filed by Plessey OverseasfiledCriticalPlessey Overseas
Priority claimed from PCT/GB1987/000068external-prioritypatent/WO1987004880A1/en
Application grantedgrantedCritical
Publication of ATE51480T1publicationCriticalpatent/ATE51480T1/de