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 FR8315481Aexternal-prioritypatent/FR2552629B1/en
Priority claimed from FR8412699Aexternal-prioritypatent/FR2568752B2/en
Application filed by Jean GrajoszexfiledCriticalJean Grajoszex
Priority claimed from EP19840401878external-prioritypatent/EP0140750B1/en
Application grantedgrantedCritical
Publication of ATE33331T1publicationCriticalpatent/ATE33331T1/en