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Application filed by Kai Engebretsen, Per Aage LysaafiledCriticalKai Engebretsen
Priority to NO913794ApriorityCriticalpatent/NO173814C/en
Publication of NO913794D0publicationCriticalpatent/NO913794D0/en
Publication of NO913794LpublicationCriticalpatent/NO913794L/en
Publication of NO173814BpublicationCriticalpatent/NO173814B/en
Publication of NO173814CpublicationCriticalpatent/NO173814C/en