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Line impedance matching using dynamically generated transfer...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of hybrid or echo suppressor or canceller
Reexamination Certificate

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Line in use detection

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Line in-use indicator for a telephone set and facsimile machine

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

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Line information security interface for TAPI service provider

Telephonic communications – Call or terminal access alarm or control – At switching center
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Line interface battery feed arrangements with PTC resistors

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

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Line interface circuit

Telephonic communications – Subscriber line or transmission line interface – Hybrid circuit
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Line interface circuit

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Line interface circuit

Telephonic communications – Subscriber line or transmission line interface
Patent

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Line interface circuit

Telephonic communications – Subscriber line or transmission line interface – Network interface device
Patent

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Line interface circuit

Telephonic communications – Subscriber line or transmission line interface – Network interface device
Patent

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Line interface circuit

Telephonic communications – Subscriber line or transmission line interface – Hybrid circuit
Patent

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Line interface circuit

Telephonic communications – Subscriber line or transmission line interface – Network interface device
Patent

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Line interface circuit with event detection signaling

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

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Line interface unit for caller-controlled receipt and delivery o

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Line interface unit retrofit circuit

Telephonic communications – Subscriber line or transmission line interface
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Line interface with analog echo cancellation

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Line interface with gain feedback coupled matching impedance

Telephonic communications – Subscriber line or transmission line interface
Reexamination Certificate

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Line interface, apparatus and method for coupling...

Telephonic communications – Subscriber line or transmission line interface
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Line isolation device for asymmetrical digital subscriber line

Telephonic communications – Subscriber line or transmission line interface
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Line loss tester

Telephonic communications – Diagnostic testing – malfunction indication – or electrical...
Reexamination Certificate

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