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Priority claimed from US06/190,678external-prioritypatent/US4463652A/en
Application filed by Francais IsolantsfiledCriticalFrancais Isolants
Priority claimed from EP81304448Aexternal-prioritypatent/EP0049134B1/en
Application grantedgrantedCritical
Publication of ATE17379T1publicationCriticalpatent/ATE17379T1/en