4. Telephonic communications
  5. Plural exchange network or interconnection
  6. With interexchange network routing

Einar Oltedal

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Arrangement for improving the speech quality, especially for...

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate

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Arrangement in a network structure

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2455107

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