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
Priority claimed from NL6804234Aexternal-prioritypatent/NL139110B/xx
Application filedfiledCritical
Priority to NL7310419ApriorityCriticalpatent/NL7310419A/xx
Publication of NL7310419ApublicationCriticalpatent/NL7310419A/xx