4. Telephonic communications
  5. Subscriber line or transmission line interface
  6. Protective circuit

David Ross Thomas

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Circuits and methods for improved network interface circuit...

Telephonic communications – Subscriber line or transmission line interface – Protective circuit
Reexamination Certificate

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Communication interface having combined shaping of receive...

Telephonic communications – Substation or terminal circuitry – Impedance matching or line equalizing
Reexamination Certificate

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Communication interface having synthesized matching...

Telephonic communications – Line equalization or impedance matching
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2077927

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