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

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Shunt regulator for hands-free telephone

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Signal compression circuit, particularly for a telephone set

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Software speakerphone system and method of operating a speakerph

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Sound pick-up method and device, in particular for handsfree...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Speaker drive arrangement for loudspeaker telephone

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Speaker volume control for voice communication device

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Speakerphone

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Speakerphone control circuit having low gain states and method f

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Speakerphone device with auxiliary circuit for eliminating click

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Speakerphone for radio and landline telephones

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Speakerphone with adaptive cancellation of room echoes

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Speakerphone with downfiring speaker and directional...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Speakerphone with event driven control circuit

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Speech communication apparatus

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Speech communication apparatus equipped with echo canceller

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Subscriber telephone set with amplified loudspeaker reception wi

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Switch with plural rotors

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Switching control apparatus for intercom-telephone sets

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Switching device for power supply to additional accessories for