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Priority claimed from GB848420537Aexternal-prioritypatent/GB8420537D0/en
Priority claimed from US06/656,470external-prioritypatent/US4600950A/en
Application filed by Rca Licensing CorpfiledCriticalRca Licensing Corp
Priority claimed from EP85305685Aexternal-prioritypatent/EP0174738B1/en
Application grantedgrantedCritical
Publication of ATE57808T1publicationCriticalpatent/ATE57808T1/en