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Application filed by Karl Heinz Walther, Petra HeymfiledCriticalKarl Heinz Walther
Priority to DD19386576ApriorityCriticalpatent/DD126746B1/de
Publication of DD126746A1publicationCriticalpatent/DD126746A1/xx
Publication of DD126746B1publicationCriticalpatent/DD126746B1/de