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

Telephonic communications – Substation or terminal circuitry – Sidetone control or hybrid circuit

Variable bandwidth handsfree telephone using switched capacitor

Telephonic communications – Substation or terminal circuitry – Sidetone control or hybrid circuit

Variable sidetone system for reducing amplitude induced...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Versatile circuit for interfacing with audio headsets

Telephonic communications – Substation or terminal circuitry – Visual signalling

Viewing angle compensation of LCD display

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Vocal frequency suppression apparatus and method

Telephonic communications – Substation or terminal circuitry – Noise suppression

Voice activity detection system and method

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Voice changer

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

Voice circuit of telephone

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Voice communication link interface

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Voice control circuit for a communication terminal

Telephonic communications – Substation or terminal circuitry – Amplifying

Voice level controller

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Voice mail apparatus and control method thereof

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Voice signal clipping circuit and telephone set therewith

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Voice suppressor

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Voice switched gain system

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Voice switched speakerphone with filters having exponential tran

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Voice-switched telephone circuit with center idle state

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Voice-switching device and method for multiple receivers