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 GB43804/66Aexternal-prioritypatent/GB1106578A/en
Application filedfiledCritical
Publication of NL6700353ApublicationCriticalpatent/NL6700353A/xx