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

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method and apparatus for volume and intelligibility control for

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method and apparatus for volume switched gain control

Telephonic communications – Substation or terminal circuitry – Amplifying

Method and device for amplifying a reception signal

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method and device for changing to a speakerphone mode

Telephonic communications – Substation or terminal circuitry – Hold circuit

Method and device for displaying a hold service on multifunction

Telephonic communications – Substation or terminal circuitry – Noise suppression

Method and means for increasing inherent channel capacity...

Telephonic communications – Substation or terminal circuitry – Noise suppression

Method and means for increasing inherent channel capacity...

Telephonic communications – Substation or terminal circuitry

Method and modem circuit using a dither signal for...

Telephonic communications – Substation or terminal circuitry – Amplifying

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

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

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

Telephonic communications – Substation or terminal circuitry

Method and system for improving the intelligibility of a...

Telephonic communications – Substation or terminal circuitry – Amplifying

Method and system for remote telephone calibration

Telephonic communications – Substation or terminal circuitry – Noise suppression

Method and system for remote telephone calibration

Telephonic communications – Substation or terminal circuitry – Amplifying

Method and system for remote telephone calibration

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method for active feedback suppression

Telephonic communications – Substation or terminal circuitry – Impedance matching or line equalizing

Method for automatically adapting levels of signals...

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 – Amplifying

Method for gain control in telephone sets having an electronic s