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

Telephonic communications – Substation or terminal circuitry – Amplifying

Amplifier arrangement

Telephonic communications – Substation or terminal circuitry – Amplifying

Apparatus for and method of operating an automatic log on/log of

Telephonic communications – Substation or terminal circuitry – Amplifying

Audio transmission circuit comprising a transmit amplifier in th

Telephonic communications – Substation or terminal circuitry – Amplifying

Digital sound level control apparatus

Telephonic communications – Substation or terminal circuitry – Amplifying

Electronic telephone set

Telephonic communications – Substation or terminal circuitry – Amplifying

Gain control

Telephonic communications – Substation or terminal circuitry – Amplifying

Hands-free phone converter

Telephonic communications – Substation or terminal circuitry – Amplifying

Headset amplifier

Telephonic communications – Substation or terminal circuitry – Amplifying

Headset amplifier with automatic log on/log off detection

Telephonic communications – Substation or terminal circuitry – Amplifying

Headset amplifier with automatic log on/log off detection

Telephonic communications – Substation or terminal circuitry – Amplifying

Integrated circuit for the transmission of telephone signals

Telephonic communications – Substation or terminal circuitry – Amplifying

Line powered universal telephone amplifier

Telephonic communications – Substation or terminal circuitry – Amplifying

Method and device for amplifying a reception signal

Telephonic communications – Substation or terminal circuitry – Amplifying

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

Telephonic communications – Substation or terminal circuitry – Amplifying

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 – Amplifying

Method for gain control in telephone sets having an electronic s

Telephonic communications – Substation or terminal circuitry – Amplifying

Portable telephone set

Telephonic communications – Substation or terminal circuitry – Amplifying

Signal detector with automatic gain control