4. Pulse or digital communications
  5. Repeaters
  6. Testing

Douglas R. Connally

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Method and apparatus for detecting digital carrier signals on te

Pulse or digital communications – Repeaters – Testing
Patent

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Method and apparatus for detecting digital carrier signals on te

Pulse or digital communications – Repeaters – Testing
Patent

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Method and system for transferring special circuit telephone pai

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

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Methods of communicating over metallic conductors having multipl

Telephonic communications – Audio message storage – retrieval – or synthesis
Patent

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Profile ID: LFUS-PAI-P-670509

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