Legal status (The legal status 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 status listed.)
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 GB4512565Aexternal-prioritypatent/GB1169356A/en
Application filedfiledCritical
Priority to FR81563ApriorityCriticalpatent/FR1497798A/fr
Application grantedgrantedCritical
Publication of FR1497798ApublicationCriticalpatent/FR1497798A/fr