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 Hellqvist Aake Oskar VilhelmfiledCriticalHellqvist Aake Oskar Vilhelm
Priority to SE8704536ApriorityCriticalpatent/SE8704536D0/sv
Publication of SE8704536D0publicationCriticalpatent/SE8704536D0/sv