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Priority claimed from DE19792900888external-prioritypatent/DE2900888A1/de
Priority claimed from DE19792924652external-prioritypatent/DE2924652A1/de
Priority claimed from SU802869296Aexternal-prioritypatent/SU974937A3/ru
Application filed by Polyfelt Ges M B TfiledCriticalPolyfelt Ges M B T
Publication of MD98B1publicationCriticalpatent/MD98B1/ro
Publication of MD98C2publicationCriticalpatent/MD98C2/ro