4. Telephonic communications
  5. With usage measurement
  6. Call charge metering or monitoring

Gary W. Leopold

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Calling card validation system and method therefor

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

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Intelligent services network architecture for global calling...

Telephonic communications – Special services – Service trigger
Reexamination Certificate

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Profile ID: LFUS-PAI-P-981045

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