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Priority claimed from GB838301325Aexternal-prioritypatent/GB8301325D0/en
Priority claimed from GB838301326Aexternal-prioritypatent/GB8301326D0/en
Application filed by Plessey OverseasfiledCriticalPlessey Overseas
Priority claimed from EP84300193Aexternal-prioritypatent/EP0122684B1/de
Application grantedgrantedCritical
Publication of ATE35204T1publicationCriticalpatent/ATE35204T1/de