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 filedfiledCritical
Priority to NL6500973ApriorityCriticalpatent/NL6500973A/xx
Priority to BE673652Dprioritypatent/BE673652A/xx
Priority to FR43733Aprioritypatent/FR1461888A/fr
Publication of NL6500973ApublicationCriticalpatent/NL6500973A/xx