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 Maurice LuyssenfiledCriticalMaurice Luyssen
Priority to BE579815ApriorityCriticalpatent/BE579815A/fr
Publication of BE579815ApublicationCriticalpatent/BE579815A/fr