4. Telephonic communications
  5. Special services
  6. Conferencing

Keith E. Smith

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Call-processing system and method

Telephonic communications – Centralized switching system
Patent

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Call-processing system and method

Telephonic communications – With usage measurement – Call traffic recording by computer or control processor
Patent

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Call-processing system and method

Telephonic communications – With usage measurement – Call charge metering or monitoring
Patent

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Call-processing system and method

Telephonic communications – Call or terminal access alarm or control – At switching center
Reexamination Certificate

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Client interface

Electrical computers and digital processing systems: multicomput – Computer network managing – Computer network monitoring
Reexamination Certificate

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Profile ID: LFUS-PAI-P-441583

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