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Priority claimed from US06/502,785external-prioritypatent/US4459080A/en
Application filed by Caterpillar Ind IncfiledCriticalCaterpillar Ind Inc
Publication of NO850462LpublicationCriticalpatent/NO850462L/no
Publication of NO159715BpublicationCriticalpatent/NO159715B/no
Publication of NO159715CpublicationCriticalpatent/NO159715C/no