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Priority claimed from GB868620698Aexternal-prioritypatent/GB8620698D0/en
Priority claimed from GB878715849Aexternal-prioritypatent/GB8715849D0/en
Application filed by Gallaher LtdfiledCriticalGallaher Ltd
Priority claimed from PCT/GB1987/000604external-prioritypatent/WO1988001478A1/en
Application grantedgrantedCritical
Publication of ATE63429T1publicationCriticalpatent/ATE63429T1/en