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
Application filed by L Devillez & Canion Sa EtsfiledCriticalL Devillez & Canion Sa Ets
Priority to BE618369ApriorityCriticalpatent/BE618369A/fr
Publication of BE618369ApublicationCriticalpatent/BE618369A/fr