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

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method for reducing noise from a non-linear device that...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method for the control of voice channel attenuation

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Method of and device for echo cancellation

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

Method of improving sidetone attenuation in electroacoustic syst

Telephonic communications – Substation or terminal circuitry – Noise suppression

Methods and apparatus for improving voice quality in an...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Microphone/loudspeaker having a speakerphone mode and a micropho

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Microprocessor-controlled full-duplex speakerphone using...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Microprocessor-controlled full-duplex speakerphone using...

Telephonic communications – Substation or terminal circuitry – Wire distribution

Modular subscriber device

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

Multi-channel echo canceler

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

Multi-function telephone apparatus and control method

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Multi-tone signal discriminator

Telephonic communications – Substation or terminal circuitry

Multirate speech codecs

Telephonic communications – Substation or terminal circuitry – Wire distribution

Network interface device with environmentally protected compartm

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

Noise cancellation apparatus

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

Noise cancelling apparatus for a telephone handset

Telephonic communications – Substation or terminal circuitry – Noise suppression

Noise compensation methods and systems for increasing the...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Noise mitigation and mode switching in communications terminals

Telephonic communications – Substation or terminal circuitry – Noise suppression

Noise reduction and comfort noise gain control using bark...