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Priority claimed from GB782171Aexternal-prioritypatent/GB1390613A/en
Application filed by Richard Wykeham Beaufoy BirchfiledCriticalRichard Wykeham Beaufoy Birch
Priority to DK474874ApriorityCriticalpatent/DK137027B/da
Publication of DK474874ApublicationCriticalpatent/DK474874A/da
Publication of DK137027BpublicationCriticalpatent/DK137027B/da
Application grantedgrantedCritical
Publication of DK137027CpublicationCriticalpatent/DK137027C/da