4. Telephonic communications
  5. With check operated control

Quoc Tran

Examiner

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Ad ringer

Telephonic communications – With usage measurement – Call charge metering or monitoring
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Alarm mechanism

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Monitoring
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Analog caller identification transmission method and apparatus

Telephonic communications – Reception of calling information at substation in wireline...
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Apparatus and method for controlling telephone...

Telephonic communications – With usage measurement – Call traffic recording by computer or control processor
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Apparatus and method for ensuring a real-time connection...

Telephonic communications – With usage measurement – Call charge metering or monitoring
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Profile ID: LFUS-PAI-P-333535

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