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 Lucien TilkensfiledCriticalLucien Tilkens
Priority to BE584471ApriorityCriticalpatent/BE584471A/fr
Publication of BE584471ApublicationCriticalpatent/BE584471A/fr