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Application filed by Frans Steffers, Gerhard Haeussler, Norbert Niklas, Hans Muenzberg, Winfried Wagner, Johannes Jurk, Harry Schlief, Wolfgang VoelzkefiledCriticalFrans Steffers
Priority to DD19618676ApriorityCriticalpatent/DD129924B1/de
Publication of DD129924A1publicationCriticalpatent/DD129924A1/de
Publication of DD129924B1publicationCriticalpatent/DD129924B1/de