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 DE1966F0050100external-prioritypatent/DE1569604A1/de
Priority claimed from FR6905672Aexternal-prioritypatent/FR2036034A5/fr
Application filedfiledCritical
Publication of BE729892ApublicationCriticalpatent/BE729892A/fr