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 Heinz Hammer, Juergen Groschopp, Klaus Neubert, Josef Nickl, Herbert MatzakfiledCriticalHeinz Hammer
Priority to DD19674776ApriorityCriticalpatent/DD128902A1/en
Publication of DD128902A1publicationCriticalpatent/DD128902A1/en