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Priority claimed from US06/692,319external-prioritypatent/US4676724A/en
Application filed by J C BirdwellfiledCriticalJ C Birdwell
Priority claimed from PCT/US1986/000049external-prioritypatent/WO1986004383A2/en
Application grantedgrantedCritical
Publication of ATE62321T1publicationCriticalpatent/ATE62321T1/en