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Publication date
Priority claimed from GB20029/61Aexternal-prioritypatent/GB937214A/en
Priority claimed from GB20029/62Aexternal-prioritypatent/GB1012683A/en
Application filed by J F Macfarlan & Company LtdfiledCriticalJ F Macfarlan & Company Ltd
Publication of BE618392ApublicationCriticalpatent/BE618392A/fr