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.)
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Application filedfiledCritical
Priority to DD17511273ApriorityCriticalpatent/DD107613A1/xx
Publication of DD107613A1publicationCriticalpatent/DD107613A1/xx
Priority to DE19742442665prioritypatent/DE2442665A1/de
Priority to FR7439722Aprioritypatent/FR2253594B1/fr
Priority to GB5242574Aprioritypatent/GB1431638A/en