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Priority claimed from US07/313,078external-prioritypatent/US4927437A/en
Priority claimed from US07/427,018external-prioritypatent/US4973341A/en
Application filed by Ben RichersonfiledCriticalBen Richerson
Publication of NO913253D0publicationCriticalpatent/NO913253D0/no
Publication of NO913253LpublicationCriticalpatent/NO913253L/no