4. Multiplex communications
  5. Pathfinding or routing
  6. Combined circuit switching and packet switching

Sung Bum Cho

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Method of conference calling supplemental service using...

Telephonic communications – Special services – Conferencing
Reexamination Certificate

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Network-based telephony gateway and network-based telephony...

Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2810273

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