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 J De Vree & Co S P R LfiledCriticalJ De Vree & Co S P R L
Priority to BE608714ApriorityCriticalpatent/BE608714A/fr
Publication of BE608714ApublicationCriticalpatent/BE608714A/fr