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 DD17454773ApriorityCriticalpatent/DD108383A1/xx
Priority to DE19742428752prioritypatent/DE2428752A1/de
Publication of DD108383A1publicationCriticalpatent/DD108383A1/xx