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 FR2606Aexternal-prioritypatent/FR88001E/fr
Application filedfiledCritical
Publication of NL6603796ApublicationCriticalpatent/NL6603796A/xx