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 BE586092ApriorityCriticalpatent/BE586092A/fr
Priority to FR815087Aprioritypatent/FR1244741A/fr
Application grantedgrantedCritical
Publication of NL95277CpublicationCriticalpatent/NL95277C/xx