Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from SE8601817Aexternal-prioritypatent/SE462703B/en
Application filed by Astra Vent AbfiledCriticalAstra Vent Ab
Publication of NO875320D0publicationCriticalpatent/NO875320D0/en
Publication of NO875320LpublicationCriticalpatent/NO875320L/en
Publication of NO168511BpublicationCriticalpatent/NO168511B/en
Publication of NO168511CpublicationCriticalpatent/NO168511C/en