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 DD18711875ApriorityCriticalpatent/DD120160A1/xx
Priority to DE19752544695prioritypatent/DE2544695A1/de
Publication of DD120160A1publicationCriticalpatent/DD120160A1/xx