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 DD179194ApriorityCriticalpatent/DD112049A1/xx
Publication of DD112049A1publicationCriticalpatent/DD112049A1/xx
Priority to DE19752521359prioritypatent/DE2521359A1/de
