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 DEST21154Uexternal-prioritypatent/DE1965119U/de
Priority claimed from DE1967ST021919external-prioritypatent/DE1979522U/de
Application filedfiledCritical
Publication of BE712492ApublicationCriticalpatent/BE712492A/xx