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Priority claimed from US06/662,069external-prioritypatent/US4590067A/en
Priority claimed from US06/778,811external-prioritypatent/US4647453A/en
Application filed by Peritain LtdfiledCriticalPeritain Ltd
Application grantedgrantedCritical
Publication of ATE75617T1publicationCriticalpatent/ATE75617T1/en