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Priority claimed from GB36371/69Aexternal-prioritypatent/GB1291839A/en
Application filed by Dale Ltd JohnfiledCriticalDale Ltd John
Priority to NO359073ApriorityCriticalpatent/NO133791C/no
Publication of NO133791BpublicationCriticalpatent/NO133791B/no
Publication of NO133791CpublicationCriticalpatent/NO133791C/no