Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filedfiledCritical
Priority to DD15341471ApriorityCriticalpatent/DD97658A2/xx
Priority to DE19712161766prioritypatent/DE2161766A1/de
Priority to FR7146770Aprioritypatent/FR2128286A5/fr
Priority to RO6943872Aprioritypatent/RO62481A/ro
Priority to NL7200796Aprioritypatent/NL7200796A/xx
Publication of DD97658A2publicationCriticalpatent/DD97658A2/xx