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 Siegbert Heise, Hartmut Lucht, Ingo EhrlichfiledCriticalSiegbert Heise
Priority to DD19919477ApriorityCriticalpatent/DD131145A1/en
Publication of DD131145A1publicationCriticalpatent/DD131145A1/en