4. Telephonic communications
  5. Diagnostic testing, malfunction indication, or electrical...
  6. Testing of subscriber loop or terminal

David Iglehart

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Apparatus and method for automatically switching a headset betwe

Telephonic communications – Centralized switching system – Switching apparatus for connecting calling line to...
Patent

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Apparatus and method for providing a telephone user with control

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

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Apparatus and method for providing a user with one telephone num

Telephonic communications – Special services – Call diversion
Patent

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Apparatus and method that allow telephone callers to leave...

Telephonic communications – Audio message storage – retrieval – or synthesis
Reexamination Certificate

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Apparatus and method to provide a functional and more user-frien

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent

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Profile ID: LFUS-PAI-P-441499

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