4. Telephonic communications
  5. Special services
  6. Performed by operator

Chun P. Tam

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Communication services method and apparatus

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

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Telephone operator and agent to database communication arrangeme

Telephonic communications – Special services – Performed by operator
Patent

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Profile ID: LFUS-PAI-P-868567

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