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Priority claimed from US06/239,084external-prioritypatent/US4344041A/en
Application filed by Sperry CorpfiledCriticalSperry Corp
Publication of NO823497LpublicationCriticalpatent/NO823497L/en
Publication of NO163930BpublicationCriticalpatent/NO163930B/en
Publication of NO163930CpublicationCriticalpatent/NO163930C/en