LandOfFree - US Patents - Listing for Telephonic communications,Substation or terminal circuitry,For loudspeaking terminal

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Echo canceling arrangement

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Reexamination Certificate

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Echo cancellation

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Echo cancellation in a full-duplex speakerphone

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Patent

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Echo cancelling system suitable for voice conference

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Echo control device with quick response to sudden echo-path chan

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Patent

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Echo reduction for a headset or handset

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Reexamination Certificate

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Echo reduction for a headset or handset

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Efficient speakerphone anti-howling system

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Patent

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Enhanced acoustic calibration procedure for a voice switched spe

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Patent

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Enhanced low pass filter

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Reexamination Certificate

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Externally dialed hand-free operator for cellular phones

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

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