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 filedfiledCritical
Priority to DD18276174ApriorityCriticalpatent/DD114870A1/xx
Publication of DD114870A1publicationCriticalpatent/DD114870A1/xx
Priority to DE19752542143prioritypatent/DE2542143A1/de