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Priority claimed from US06/736,305external-prioritypatent/US4817142A/en
Application filed by Scientific AtlantafiledCriticalScientific Atlanta
Publication of NO870223LpublicationCriticalpatent/NO870223L/no
Publication of NO170449BpublicationCriticalpatent/NO170449B/no
Publication of NO170449CpublicationCriticalpatent/NO170449C/no