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Priority claimed from FI974277Aexternal-prioritypatent/FI104931B/sv
Application filed by Helsingin Puhelin OyjfiledCriticalHelsingin Puhelin Oyj
Priority to FI982488ApriorityCriticalpatent/FI114070B/sv
Publication of FI982488A0publicationCriticalpatent/FI982488A0/sv
Publication of FI982488ApublicationCriticalpatent/FI982488A/sv
Application grantedgrantedCritical
Publication of FI114070BpublicationCriticalpatent/FI114070B/sv