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Priority claimed from US06/704,992external-prioritypatent/US4612183A/en
Priority claimed from US06/704,842external-prioritypatent/US4612181A/en
Application filed by Gte Prod CorpfiledCriticalGte Prod Corp
Priority claimed from EP19860102455external-prioritypatent/EP0193171B1/en
Application grantedgrantedCritical
Publication of ATE66436T1publicationCriticalpatent/ATE66436T1/en