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Priority claimed from US06/766,971external-prioritypatent/US4647028A/en
Priority claimed from GB858520789Aexternal-prioritypatent/GB8520789D0/en
Application filed by Yang Tai HerfiledCriticalYang Tai Her
Priority claimed from EP19860306412external-prioritypatent/EP0214785B1/de
Application grantedgrantedCritical
Publication of ATE48964T1publicationCriticalpatent/ATE48964T1/de