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 DE19671592222external-prioritypatent/DE1592222C3/de
Application filedfiledCritical
Publication of NL6812980ApublicationCriticalpatent/NL6812980A/xx