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
Publication date
Priority claimed from AT618765Aexternal-prioritypatent/AT261832B/de
Priority claimed from AT618665Aexternal-prioritypatent/AT264033B/de
Application filedfiledCritical
Publication of BE681534ApublicationCriticalpatent/BE681534A/xx
