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 DE19691932670external-prioritypatent/DE1932670A1/de
Priority claimed from DE19691947809external-prioritypatent/DE1947809A1/de
Application filedfiledCritical
Publication of BE742554ApublicationCriticalpatent/BE742554A/xx
