4. Telephonic communications
  5. Centralized switching system
  6. Switching controlled in response to called station...

American Express TRS

Corporate Assignee

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Automated billing consolidation system and method

Boots – shoes – and leggings
Patent

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Fast last digit detection of a dialed telephone number

Telephonic communications – Centralized switching system – Switching controlled in response to called station...
Patent

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Methods and apparatus for providing a prepaid, remote memory tra

Telephonic communications – Audio message storage – retrieval – or synthesis – Message management
Patent

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Refundable prepaid telephone card

Registers – Records
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Refundable prepaid telephone card

Registers – Records
Patent

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