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 Fernand DelersfiledCriticalFernand Delers
Priority to BE583559ApriorityCriticalpatent/BE583559A/en
Publication of BE583559ApublicationCriticalpatent/BE583559A/en