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Application filed by Guenter Obering Bergmann, Rolf Haase, Cuno Dietrich, Walter SchillingfiledCriticalGuenter Obering Bergmann
Priority to DD19511176ApriorityCriticalpatent/DD127447B1/de
Publication of DD127447A1publicationCriticalpatent/DD127447A1/de
Publication of DD127447B1publicationCriticalpatent/DD127447B1/de