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 DESCH41921Uexternal-prioritypatent/DE1963802U/de
Priority claimed from DESCH43668Uexternal-prioritypatent/DE1979104U/de
Application filedfiledCritical
Publication of BE709204ApublicationCriticalpatent/BE709204A/xx