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Application filed by Alf Johan BjerkefiledCriticalAlf Johan Bjerke
Priority to NO802693ApriorityCriticalpatent/NO148245C/en
Publication of NO802693LpublicationCriticalpatent/NO802693L/en
Publication of NO148245BpublicationCriticalpatent/NO148245B/en
Publication of NO148245CpublicationCriticalpatent/NO148245C/en