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Priority claimed from SE14569/69Aexternal-prioritypatent/SE336547B/xx
Application filed by Siporex Int AbfiledCriticalSiporex Int Ab
Priority to DK147571ApriorityCriticalpatent/DK133859B/en
Publication of DK133859BpublicationCriticalpatent/DK133859B/en
Application grantedgrantedCritical
Publication of DK133859CpublicationCriticalpatent/DK133859C/da