4. Telephonic communications
  5. With check operated control
  6. At terminal station

John Maurice McDonald

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Multimedia public communication services distribution method and

Electrical computers and digital processing systems: multicomput – Network computer configuring – Initializing
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Public communications services vending method and apparatus

Telephonic communications – With check operated control – At terminal station
Patent

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Profile ID: LFUS-PAI-P-219977

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