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
Application filed by Aake Engwall, Sten EngwallfiledCriticalAake Engwall
Priority to SE9300560ApriorityCriticalpatent/SE9300560D0/en
Publication of SE9300560D0publicationCriticalpatent/SE9300560D0/en