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Priority claimed from GB838320881Aexternal-prioritypatent/GB8320881D0/en
Application filed by Pilkington Brothers PlcfiledCriticalPilkington Brothers Plc
Priority claimed from EP83305528Aexternal-prioritypatent/EP0104870B1/en
Application grantedgrantedCritical
Publication of ATE31525T1publicationCriticalpatent/ATE31525T1/en