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Priority claimed from SE8207021Aexternal-prioritypatent/SE444700C/en
Application filed by Harry KarlssonfiledCriticalHarry Karlsson
Publication of NO842268LpublicationCriticalpatent/NO842268L/en
Publication of NO160800BpublicationCriticalpatent/NO160800B/en
Publication of NO160800CpublicationCriticalpatent/NO160800C/en