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Priority claimed from US07/281,493external-prioritypatent/US4860544A/en
Priority claimed from US07/392,941external-prioritypatent/US4974425A/en
Application filed by Rkk LtdfiledCriticalRkk Ltd
Publication of NO912198D0publicationCriticalpatent/NO912198D0/no
Publication of NO912198LpublicationCriticalpatent/NO912198L/no