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Priority claimed from PCT/GB1981/000245external-prioritypatent/WO1982001736A1/en
Application filed by Klaas ZwartfiledCriticalKlaas Zwart
Publication of NO822500LpublicationCriticalpatent/NO822500L/no
Publication of NO162579BpublicationCriticalpatent/NO162579B/no
Publication of NO162579CpublicationCriticalpatent/NO162579C/no