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 to NL129475DpriorityCriticalpatent/NL129475C/xx
Application filedfiledCritical
Priority to NL6506617Aprioritypatent/NL6506617A/xx
Priority to BE664778Aprioritypatent/BE664778A/fr
Publication of NL6506617ApublicationCriticalpatent/NL6506617A/xx