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Priority claimed from US05/915,306external-prioritypatent/US4272577A/en
Application filed by Norsk Skiforsk, Sentralinst For Ind ForskningfiledCriticalNorsk Skiforsk
Publication of NO783764LpublicationCriticalpatent/NO783764L/no
Publication of NO145603BpublicationCriticalpatent/NO145603B/no
Publication of NO145603CpublicationCriticalpatent/NO145603C/no