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Priority claimed from US06/240,757external-prioritypatent/US4425720A/en
Priority claimed from US06/282,153external-prioritypatent/US4455763A/en
Application filed by Franklin R ElevitchfiledCriticalFranklin R Elevitch
Application grantedgrantedCritical
Publication of ATE27220T1publicationCriticalpatent/ATE27220T1/de