LandOfFree - US Patents - Listing for Telephonic communications

Telephonic communications – Terminal – Housing or housing component

Back cover for a mobile phone

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – With blocking of normal usage

Back wiring board and aggregated device

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

Background noise compensation in a telephone network

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

Background noise compensation in a telephone network

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

Background noise compensation in a telephone set

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

Background noise compensation in a telephone set

Telephonic communications – Audio message storage – retrieval – or synthesis – Voice activation or recognition

Background speech recognition for voice messaging applications

Telephonic communications – Centralized switching system – Switching controlled in response to called station...

Backup apparatus against line defect and backup method against l

Telephonic communications – Subscriber line or transmission line interface – Network interface device

Backup battery power supply for microprocessor based telephones

Telephonic communications – Subscriber line or transmission line interface – Network interface device

Backup power supply at subscriber terminal

Telephonic communications – Subscriber line or transmission line interface – Hybrid circuit

Balance network directional coupler system and method

Telephonic communications – Subscriber line or transmission line interface – Protective circuit

Balanced heat coil protector

Telephonic communications – Subscriber line or transmission line interface – Hybrid circuit

Balanced hybrid circuit

Telephonic communications – Multi-line or key substation system with selective switching...

Balanced network for use in a keyphone system

Telephonic communications – Subscriber line or transmission line interface – Hybrid circuit

Balanced phase splitting circuit

Telephonic communications – Transmission line conditioning – Interference suppression

Balanced spectrum limiter for telephone and communication...

Telephonic communications – Substation or terminal circuitry – Impedance matching or line equalizing

Balanced transmission device

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing

Balancing loads on telecommunications links

Telephonic communications – Subscriber line or transmission line interface – Protective circuit

Balancing resistor and thermistor network for telephone circuits