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

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method and apparatus for volume switched gain control

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method and device for changing to a speakerphone mode

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method and system for automatic gain control with adaptive...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method for active feedback suppression

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method for electrically simulating a cradle switch and a hands f

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method for fail-safe operation in a speaker phone system

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method for reducing noise from a non-linear device that...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method for the control of voice channel attenuation

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method of and device for echo cancellation

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Microphone/loudspeaker having a speakerphone mode and a micropho

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Microprocessor-controlled full-duplex speakerphone using...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Microprocessor-controlled full-duplex speakerphone using...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Multi-tone signal discriminator

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Noise mitigation and mode switching in communications terminals

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Noise suppression of acoustic signal in telephone set

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Pocket speakerphone

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Portable terminal

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Processing audio signals using a discrete state machine

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Radio and land-line telephones with hands-free operation