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 Ernst Madai, Claussen Hans Juergen, Erich AlbrechtfiledCriticalErnst Madai
Priority to DD19473676ApriorityCriticalpatent/DD149028A2/de
Publication of DD149028A2publicationCriticalpatent/DD149028A2/de