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Priority claimed from US07/739,903external-prioritypatent/US5192161A/en
Application filed by Ulf Helgesson, Bjorn HelgessonfiledCriticalUlf Helgesson
Publication of GR920100344ApublicationCriticalpatent/GR920100344A/el
Publication of GR1002532BpublicationCriticalpatent/GR1002532B/el