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 DD19258276ApriorityCriticalpatent/DD125297A1/xx
Priority to CH263177Aprioritypatent/CH613517A5/de
Publication of DD125297A1publicationCriticalpatent/DD125297A1/xx
Priority to IT6796577Aprioritypatent/IT1073624B/it