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Priority claimed from GB1557672Aexternal-prioritypatent/GB1431043A/en
Application filed by Rca CorpfiledCriticalRca Corp
Priority to AT814177ApriorityCriticalpatent/AT379720B/de
Publication of ATA814177ApublicationCriticalpatent/ATA814177A/de
Application grantedgrantedCritical
Publication of AT379720BpublicationCriticalpatent/AT379720B/de