4. Telephonic communications
  5. Special services
  6. Automatic directory service

Christopher Jessen

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Distribution of location information in IP networks by...

Electrical computers and digital processing systems: multicomput – Computer conferencing – Cooperative computer processing
Reexamination Certificate

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Method and apparatus for providing advanced IP telephony...

Telephonic communications – Special services – Automatic directory service
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2616392

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