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

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Device and method for automatically controlling sound volume in

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Device for forming the hands-free function in a telephone set, a

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Digital adaptive filter and acoustic echo canceller using...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Digital loudspeaking telephone

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Digital subscriber line (DSL) modem compatible with home...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Directional microphone assembly

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Distributed processing of audio signals

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Dual-mode speaker telephone

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Duplex hands-free communications circuit

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Duplex transducer for simultaneous voice broadcast and reception

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Dynamic optimization of handsfree microphone gain

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Dynamically adjustable digital gyrator having extendable...