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 SE8602931Aexternal-prioritypatent/SE457693B/sv
Application filed by Drilletten AbfiledCriticalDrilletten Ab
Publication of NO880560D0publicationCriticalpatent/NO880560D0/no
Publication of NO880560LpublicationCriticalpatent/NO880560L/no
Publication of NO175454BpublicationCriticalpatent/NO175454B/no
Publication of NO175454CpublicationCriticalpatent/NO175454C/no