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Priority claimed from SE8601822Aexternal-prioritypatent/SE452918B/en
Application filed by Gert A JohanssonfiledCriticalGert A Johansson
Publication of NO875301D0publicationCriticalpatent/NO875301D0/en
Publication of NO875301LpublicationCriticalpatent/NO875301L/en
Publication of NO172997BpublicationCriticalpatent/NO172997B/en
Publication of NO172997CpublicationCriticalpatent/NO172997C/en