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Priority claimed from GB1015572Aexternal-prioritypatent/GB1371135A/en
Application filed by Ward Blenkinsop & Co LtdfiledCriticalWard Blenkinsop & Co Ltd
Publication of DK176ApublicationCriticalpatent/DK176A/da
Publication of DK139654BpublicationCriticalpatent/DK139654B/en
Application grantedgrantedCritical
Publication of DK139654CpublicationCriticalpatent/DK139654C/da