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Priority claimed from US06/941,376external-prioritypatent/US4694536A/en
Application filed by Townsend Engineering CofiledCriticalTownsend Engineering Co
Publication of FI932318ApublicationCriticalpatent/FI932318A/fi
Publication of FI932318A0publicationCriticalpatent/FI932318A0/fi
Application grantedgrantedCritical
Publication of FI104613BpublicationCriticalpatent/FI104613B/fi