4. Telephonic communications
  5. With check operated control
  6. Other than coin

National Telemanagement Corporation

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Prepay telecommunications system

Telecommunications – Radiotelephone system – Usage measurement
Reexamination Certificate

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Prepay telecommunications system

Telecommunications – Radiotelephone system – Usage measurement
Patent

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Prepay telecommunications system with unregistered roaming call

Telecommunications – Radiotelephone system – Usage measurement
Patent

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System and method for a prepaid bundled telecommunications accou

Telephonic communications – With check operated control – Other than coin
Patent

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