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 FR18318Aexternal-prioritypatent/FR1444841A/fr
Priority claimed from FR57063Aexternal-prioritypatent/FR1481264A/fr
Application filedfiledCritical
Publication of NL6607210ApublicationCriticalpatent/NL6607210A/xx