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 NL302003DpriorityCriticalpatent/NL302003A/xx
Priority to GB5011/63Aprioritypatent/GB978101A/en
Priority to FR959076Aprioritypatent/FR1378663A/fr
Application filedfiledCritical
Priority to BE643523Aprioritypatent/BE643523A/xx
Publication of BE643523ApublicationCriticalpatent/BE643523A/xx