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Application filedfiledCritical
Priority to DD16096372ApriorityCriticalpatent/DD109655A2/xx
Priority to DE19722249059prioritypatent/DE2249059A1/de
Priority to HUPE000846prioritypatent/HU166139B/hu
Priority to FR7236911Aprioritypatent/FR2157568A5/fr
Publication of DD109655A2publicationCriticalpatent/DD109655A2/xx