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 FR83135Aexternal-prioritypatent/FR1506557A/fr
Priority claimed from FR97925Aexternal-prioritypatent/FR92017E/fr
Application filedfiledCritical
Publication of BE704293ApublicationCriticalpatent/BE704293A/xx