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 GB41454/58Aexternal-prioritypatent/GB919491A/en
Priority claimed from GB2119159Aexternal-prioritypatent/GB891895A/en
Priority claimed from FR813869Aexternal-prioritypatent/FR1314362A/fr
Application filedfiledCritical
Priority to FR837327ApriorityCriticalpatent/FR537M/fr
Application grantedgrantedCritical
Publication of FR537MpublicationCriticalpatent/FR537M/fr
