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 NL6904273ApriorityCriticalpatent/NL6904273A/xx
Priority to DE19702013463prioritypatent/DE2013463A1/de
Priority to CH425470Aprioritypatent/CH516020A/de
Publication of NL6904273ApublicationCriticalpatent/NL6904273A/xx
