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Priority claimed from US06/176,270external-prioritypatent/US4419998A/en
Application filed by R2 CorpfiledCriticalR2 Corp
Publication of NO821202LpublicationCriticalpatent/NO821202L/en
Publication of NO168509BpublicationCriticalpatent/NO168509B/en
Publication of NO168509CpublicationCriticalpatent/NO168509C/en