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Priority claimed from US06/583,890external-prioritypatent/US4640151A/en
Application filed by Richard J HowellfiledCriticalRichard J Howell
Priority claimed from EP19850301315external-prioritypatent/EP0155114B1/de
Application grantedgrantedCritical
Publication of ATE53803T1publicationCriticalpatent/ATE53803T1/de