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Priority to DD18001874ApriorityCriticalpatent/DD113246A2/xx
Priority to DE2443488Aprioritypatent/DE2443488A1/de
Priority to NL7412388Aprioritypatent/NL7412388A/xx
Priority to JP11477874Aprioritypatent/JPS50111172A/ja
Priority to GB4601074Aprioritypatent/GB1436309A/en
Priority to FR7435917Aprioritypatent/FR2257637B1/fr
Publication of DD113246A2publicationCriticalpatent/DD113246A2/xx