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Priority claimed from SE8207127Aexternal-prioritypatent/SE446468B/en
Application filed by Stig PetterssonfiledCriticalStig Pettersson
Publication of NO834568LpublicationCriticalpatent/NO834568L/en
Publication of NO158761BpublicationCriticalpatent/NO158761B/en
Publication of NO158761CpublicationCriticalpatent/NO158761C/en