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Application filed by Sigmund FinvoldfiledCriticalSigmund Finvold
Priority to NO871287ApriorityCriticalpatent/NO162321C/en
Publication of NO871287D0publicationCriticalpatent/NO871287D0/en
Publication of NO871287LpublicationCriticalpatent/NO871287L/en
Publication of NO162321BpublicationCriticalpatent/NO162321B/en
Publication of NO162321CpublicationCriticalpatent/NO162321C/en