4. Multiplex communications
  5. Special services
  6. Conferencing

Leroy E. Gilbert

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Method and apparatus for DTMF signaling on compressed voice...

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

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Method and apparatus for DTMF signaling on compressed voice...

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

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Method and apparatus for facilitating communication between mult

Multiplex communications – Special services – Conferencing
Patent

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Method and apparatus for routing blocked telephone calls

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Reexamination Certificate

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Profile ID: LFUS-PAI-P-741725

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