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 FR8812721Aexternal-prioritypatent/FR2637006B1/fr
Priority claimed from FR898903577Aexternal-prioritypatent/FR2644504B2/fr
Application filed by Ferco Int Usine FerruresfiledCriticalFerco Int Usine Ferrures
Application grantedgrantedCritical
Publication of ATE83030T1publicationCriticalpatent/ATE83030T1/de