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 Guenter Fuchs, Wolfgang Helbig, Ullrich Klett, Paul RadkefiledCriticalGuenter Fuchs
Priority to DD20274777ApriorityCriticalpatent/DD138477A3/de
Priority to SU787770361Aprioritypatent/SU950752A1/ru
Publication of DD138477A3publicationCriticalpatent/DD138477A3/de