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Priority claimed from GB848418824Aexternal-prioritypatent/GB8418824D0/en
Priority claimed from GB848418825Aexternal-prioritypatent/GB8418825D0/en
Application filed by Merseyside And North Wales ElefiledCriticalMerseyside And North Wales Ele
Priority claimed from EP85305207Aexternal-prioritypatent/EP0173446B1/de
Application grantedgrantedCritical
Publication of ATE46383T1publicationCriticalpatent/ATE46383T1/de