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

Debabrata Patro

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System, method, and computer program product for rating...

Telephonic communications – With usage measurement – Call charge metering or monitoring
Reexamination Certificate

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System, method, and computer program product for short...

Telecommunications – Radiotelephone system – Auxiliary data signaling
Reexamination Certificate

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