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Application filed by Nordisk Elektroakustik AsfiledCriticalNordisk Elektroakustik As
Priority to DK86976ApriorityCriticalpatent/DK137057B/da
Publication of DK86976ApublicationCriticalpatent/DK86976A/da
Publication of DK137057BpublicationCriticalpatent/DK137057B/da
Application grantedgrantedCritical
Publication of DK137057CpublicationCriticalpatent/DK137057C/da