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Application filed by Helsingin Puhelin OyfiledCriticalHelsingin Puhelin Oy
Priority to FI970155ApriorityCriticalpatent/FI110654B/en
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Publication of FI970155ApublicationCriticalpatent/FI970155A/en
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Publication of FI110654BpublicationCriticalpatent/FI110654B/en