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Priority claimed from GB49924/74Aexternal-prioritypatent/GB1531214A/en
Application filed by Rca CorpfiledCriticalRca Corp
Publication of ATA447578ApublicationCriticalpatent/ATA447578A/de
Application grantedgrantedCritical
Publication of AT372563BpublicationCriticalpatent/AT372563B/de