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Priority claimed from US06/494,005external-prioritypatent/US4457844A/en
Priority claimed from US06/494,641external-prioritypatent/US4436632A/en
Priority claimed from EP83305946Aexternal-prioritypatent/EP0125364B1/en
Application filed by Beard Harold JfiledCriticalBeard Harold J
Publication of KE3827ApublicationCriticalpatent/KE3827A/en