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

Jefferey F. Harold

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3-Way call detection system

Telephonic communications – Call or terminal access alarm or control – Fraud or improper use mitigating or indication
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3-Way call detection system and method

Telephonic communications – Call or terminal access alarm or control – Fraud or improper use mitigating or indication
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Acoustic echo cancellation

Telephonic communications – Echo cancellation or suppression – Residual echo cancellation
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Acoustic transducer assembly

Telephonic communications – Terminal – Housing or housing component
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ADSL filter

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
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Profile ID: LFUS-PAI-P-2136180

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