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 Hans Froehlich, Peter ScheibnerfiledCriticalHans Froehlich
Priority to DD19917377ApriorityCriticalpatent/DD131148A1/en
Publication of DD131148A1publicationCriticalpatent/DD131148A1/en