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 Frans Van KerckhovenfiledCriticalFrans Van Kerckhoven
Priority to BE582529ApriorityCriticalpatent/BE582529A/en
Publication of BE582529ApublicationCriticalpatent/BE582529A/en