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

Harminder Singh

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Long distance service bureau

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

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Method and system for extending the directory number of a termin

Telephonic communications – Special services – Call diversion
Patent

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Profile ID: LFUS-PAI-P-656822

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