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 filedfiledCritical
Priority to BE670037ApriorityCriticalpatent/BE670037A/xx
Priority to FR32770Aprioritypatent/FR1448473A/fr
Publication of BE670037ApublicationCriticalpatent/BE670037A/xx