LandOfFree - US Patents - Listing for Telephonic communications

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

Door intercom

Telephonic communications – Private or single line system – Doorbell system

Door intercom device

Telephonic communications – Private or single line system – At collective house

Door intercom system

Telephonic communications – Audio message storage – retrieval – or synthesis – Dynamic audio signal recording or reproduction

Door message apparatus with telephone answering device

Telephonic communications – Private or single line system – Doorbell system

Door security system

Telephonic communications – Audio message storage – retrieval – or synthesis – Multilingual system or operation

DOS compatible dictation and voice mail system

Telephonic communications – Audio message storage – retrieval – or synthesis

DOS-based card-type voice mail system

Telephonic communications – Emergency or alarm communications – Responsive to sensed nonsystem condition

Double annular ring speaker gasket

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Double duty capacitor circuit and method

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

Double echo cancelling system

Telephonic communications – Terminal – Housing or housing component

Double sided keyboard for a telephone

Telephonic communications – Echo cancellation or suppression – Disable or inhibit function

Double talk activity detector and method for an echo...

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

Double talk and echo path change detection in a telephony system

Telephonic communications – Echo cancellation or suppression

Double talk and line noise detector for a echo canceller

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

Double talk detection and echo control circuit

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

Double talk detector for echo canceller and method

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

Double talk detector, method for double talk detection and...

Telephonic communications – Echo cancellation or suppression – Using digital signal processing

Double talk, NLP and comfort noise

Telephonic communications – Terminal – Housing or housing component

Double-bell ringing system of a telephone