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 filed by Wilhelm Tomasch, Martin Stroefer, Guenter HessefiledCriticalWilhelm Tomasch
Priority to DD20759578ApriorityCriticalpatent/DD138518A1/en
Publication of DD138518A1publicationCriticalpatent/DD138518A1/en