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

Graham Howard

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Diagnostic device for troubleshooting remote digital feature pho

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Patent

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Digital switching arrangements for stored program control teleco

Multiplex communications – Wide area network – Packet switching
Patent

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Method and apparatus for selecting data from multiple...

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

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Profile ID: LFUS-PAI-P-441503

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