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 NL6517284ApriorityCriticalpatent/NL6517284A/xx
Priority to DE1966B0068212prioritypatent/DE1953227U/de
Publication of NL6517284ApublicationCriticalpatent/NL6517284A/xx