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 NL6502287ApriorityCriticalpatent/NL6502287A/xx
Priority to FR50556Aprioritypatent/FR1469782A/fr
Priority to BE676864Dprioritypatent/BE676864A/xx
Priority to GB770066Aprioritypatent/GB1106401A/en
Publication of NL6502287ApublicationCriticalpatent/NL6502287A/xx