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 Albert De KerpelfiledCriticalAlbert De Kerpel
Priority to BE579575ApriorityCriticalpatent/BE579575R/nl
Application grantedgrantedCritical
Publication of BE579575RpublicationCriticalpatent/BE579575R/nl