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Priority claimed from GB868601802Aexternal-prioritypatent/GB8601802D0/en
Priority claimed from GB868626420Aexternal-prioritypatent/GB8626420D0/en
Application filed by Siemens Plessey ElectronicfiledCriticalSiemens Plessey Electronic
Priority claimed from EP87300421Aexternal-prioritypatent/EP0232041B1/de
Application grantedgrantedCritical
Publication of ATE87413T1publicationCriticalpatent/ATE87413T1/de