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 DEP25857Aexternal-prioritypatent/DE1227434B/en
Application filedfiledCritical
Priority to FR873563ApriorityCriticalpatent/FR1309264A/en
Application grantedgrantedCritical
Publication of FR1309264ApublicationCriticalpatent/FR1309264A/en