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 DE2350318Aexternal-prioritypatent/DE2350318C3/de
Application filedfiledCritical
Publication of DD113995A5publicationCriticalpatent/DD113995A5/xx