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.)
Publication date
Priority to AT4238DpriorityCriticalpatent/AT4238B/de
Priority to AT4399Dprioritypatent/AT4399B/de
Application grantedgrantedCritical
Publication of AT3756BpublicationCriticalpatent/AT3756B/de