4. Telephonic communications
  5. With check operated control
  6. Fraud or interference prevention

Rene Kalfon

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Control and surveillance system for prepayment public telephone

Telephonic communications – Telephone line or system combined with diverse electrical... – Credit authorization
Patent

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Prepayment product or service dispenser

Telephonic communications – With check operated control – Fraud or interference prevention
Patent

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Profile ID: LFUS-PAI-P-1751685

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