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 FR8814698Aexternal-prioritypatent/FR2638688B1/en
Priority claimed from FR8912596Aexternal-prioritypatent/FR2652316B1/en
Application filed by Cousin Cie Ets A & M FreresfiledCriticalCousin Cie Ets A & M Freres
Priority claimed from EP89403088Aexternal-prioritypatent/EP0368761B1/en
Application grantedgrantedCritical
Publication of ATE76368T1publicationCriticalpatent/ATE76368T1/en