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 GB1896358Aexternal-prioritypatent/GB881265A/en
Priority claimed from FR796484Aexternal-prioritypatent/FR1295339A/fr
Application filedfiledCritical
Priority to FR837353ApriorityCriticalpatent/FR557M/fr
Application grantedgrantedCritical
Publication of FR557MpublicationCriticalpatent/FR557M/fr