LandOfFree - US Patents - Listing for Telephonic communications,Line equalization or impedance matching

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Scaled impedance replica for echo attenuation in digital...

Telephonic communications – Line equalization or impedance matching

Reexamination Certificate

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Selectable impedance line interface circuit

Telephonic communications – Line equalization or impedance matching

Patent

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Signal interface circuit with selectable signal interface parame

Telephonic communications – Line equalization or impedance matching

Patent

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Simulating changes in telephone subscriber line

Telephonic communications – Line equalization or impedance matching

Patent

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Subscriber line circuit having improved AC impedance matching

Telephonic communications – Line equalization or impedance matching

Patent

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Subscriber line interface circuit

Telephonic communications – Line equalization or impedance matching

Patent

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Subscriber line interface circuitry

Telephonic communications – Line equalization or impedance matching

Reexamination Certificate

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Synthesized telephone line ring signal impedance termination

Telephonic communications – Line equalization or impedance matching

Reexamination Certificate

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System and method for providing a frequency dependent...

Telephonic communications – Line equalization or impedance matching

Reexamination Certificate

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System and method for transmission system automatic impedance ma

Telephonic communications – Line equalization or impedance matching

Patent

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