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 Jean Joseph De Laet, Maurice Ronsmans, Antoine Joseph Van HorickfiledCriticalJean Joseph De Laet
Priority to BE574873ApriorityCriticalpatent/BE574873A/fr
Publication of BE574873ApublicationCriticalpatent/BE574873A/fr