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Application filed by Ingolv HellandfiledCriticalIngolv Helland
Priority to NO874340ApriorityCriticalpatent/NO163713C/no
Publication of NO874340D0publicationCriticalpatent/NO874340D0/no
Priority to SE8901332Aprioritypatent/SE467274B/sv
Publication of NO874340LpublicationCriticalpatent/NO874340L/no
Publication of NO163713BpublicationCriticalpatent/NO163713B/no
Publication of NO163713CpublicationCriticalpatent/NO163713C/no
Saett att lufta mellanoerat medelst en i oerats trumhinna applicerbar ventilationstub, ventilationstub foer utfoerande av saettet jaemte anvaendning av en dylik ventilationstub.