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Priority claimed from US06/820,388external-prioritypatent/US4859611A/en
Application filed by Univ Boston, Massachusetts Inst TechnologyfiledCriticalUniv Boston
Priority claimed from EP86301462Aexternal-prioritypatent/EP0196787B2/en
Application grantedgrantedCritical
Publication of ATE54372T1publicationCriticalpatent/ATE54372T1/en