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 NL6800864ApriorityCriticalpatent/NL152621B/xx
Priority to BE726887Dprioritypatent/BE726887A/xx
Priority to DE19691902044prioritypatent/DE1902044C3/de
Publication of NL6800864ApublicationCriticalpatent/NL6800864A/xx
Publication of NL152621BpublicationCriticalpatent/NL152621B/xx