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Priority claimed from GB858507457Aexternal-prioritypatent/GB8507457D0/en
Priority claimed from GB858507460Aexternal-prioritypatent/GB8507460D0/en
Application filed by Pilkington PlcfiledCriticalPilkington Plc
Priority claimed from EP86301651Aexternal-prioritypatent/EP0196178B1/en
Application grantedgrantedCritical
Publication of ATE65070T1publicationCriticalpatent/ATE65070T1/en