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 FR844517Aexternal-prioritypatent/FR1280642A/fr
Priority claimed from FR844518Aexternal-prioritypatent/FR909M/fr
Application filed by Ile D Etudes Et De Rech S SciefiledCriticalIle D Etudes Et De Rech S Scie
Publication of BE609710ApublicationCriticalpatent/BE609710A/fr