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 ThieryfiledCriticalLucien Thiery
Priority to BE587748ApriorityCriticalpatent/BE587748A/fr
Publication of BE587748ApublicationCriticalpatent/BE587748A/fr