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Priority claimed from GB31386/68Aexternal-prioritypatent/GB1255933A/en
Application filed by Lansing Bagnall LtdfiledCriticalLansing Bagnall Ltd
Publication of DK131588BpublicationCriticalpatent/DK131588B/da
Application grantedgrantedCritical
Publication of DK131588CpublicationCriticalpatent/DK131588C/da