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 GB779063ApriorityCriticalpatent/GB1025964A/en
Application filedfiledCritical
Priority to BE644424Aprioritypatent/BE644424A/xx
Publication of BE644424ApublicationCriticalpatent/BE644424A/xx