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

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Line interface with analog echo cancellation

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Loop gain processing system for speakerphone applications

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Loudspeaker gain correction for a hands-free telephone terminal

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Loudspeaker telephone device comprising a novel noise suppressin

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Loudspeaker volume range control

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Loudspeaking telephone instrument

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Loudspeaking telephone set having an anti-Larsen device for inst

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Loudspeaking telephone station including directional microphone

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Loudspeaking telephone with a frequency shifting circuit

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Low current signal compression circuit