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Application filed by Christer Karlsson, Curth SvenssonfiledCriticalChrister Karlsson
Priority to SE8206905ApriorityCriticalpatent/SE430457B/sv
Publication of SE8206905D0publicationCriticalpatent/SE8206905D0/sv
Publication of SE430457BpublicationCriticalpatent/SE430457B/sv
Multiplex communication system for sound signal and data for telephone call or signal for picture communication of electric communication circuit for narrow-band transmission