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Priority claimed from FR81226Aexternal-prioritypatent/FR1513334A/fr
Priority claimed from FR81369Aexternal-prioritypatent/FR1514148A/fr
Priority claimed from FR84070Aexternal-prioritypatent/FR1516003A/fr
Priority claimed from FR156822Aexternal-prioritypatent/FR94971E/fr
Application filed by Tractel SafiledCriticalTractel Sa
Application grantedgrantedCritical
Publication of AT305540BpublicationCriticalpatent/AT305540B/de