4. Telephonic communications
  5. With usage measurement
  6. Call charge metering or monitoring

John T. Boatwright

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Call security system

Telecommunications – Radiotelephone system – Security or fraud prevention
Reexamination Certificate

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Call security system

Telecommunications – Radiotelephone system – Security or fraud prevention
Reexamination Certificate

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Call security system which detects fraud by examination of...

Telecommunications – Radiotelephone system – Security or fraud prevention
Reexamination Certificate

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Call-disposition analyzer

Telephonic communications – With usage measurement – Call charge metering or monitoring
Patent

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Special services add-on for dial pulse activated telephone switc

Patent

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Profile ID: LFUS-PAI-P-814013

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