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 Bernhard Schwabe, Horst UllmannfiledCriticalBernhard Schwabe
Priority to DD19937777ApriorityCriticalpatent/DD132983A1/de
Publication of DD132983A1publicationCriticalpatent/DD132983A1/de