4. Multiplex communications
  5. Wide area network
  6. Packet switching

Julie M. Ladieu-Walton

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Multiplex communications – Wide area network – Packet switching
Patent

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Method and apparatus for processing telephone calls charged to c

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

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Method and apparatus for processing telephone calls charged to c

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

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Telephone network credit card calling apparatus and method of op

Telephonic communications – Telephone line or system combined with diverse electrical... – Credit authorization
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Profile ID: LFUS-PAI-P-1071860

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