LandOfFree - US Patents - Listing for Telephonic communications

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...

Direct connect modem deriving power from telephone line

Telephonic communications – Substation or terminal circuitry – Noise suppression

Direct coupling of telephone volume control with remote...

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

Direct current feed with line status change adaptation in a comm

Telephonic communications – Terminal – Housing or housing component

Direct current vibration motor and armature structure

Telephonic communications – Centralized switching system – Call distribution to operator

Direct customer control of a network router

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling

Direct dialing-in method in a pabx

Telephonic communications – With usage measurement – Call charge metering or monitoring

Direct distance dialing (DDD) access to a communication...

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

Direct distance dialing (DDD) access to a communications service

Telephonic communications – Call signal generating

Direct drive for a subscriber line differential ringing signal

Telephonic communications – Call signal generating

Direct drive for a subscriber line differential ringing...

Telephonic communications – Audio message storage – retrieval – or synthesis

Direct inward dial integration apparatus

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling

Direct inward-outward dialing trunk circuit

Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network

Direct pager access with full number dialing

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling

Direct route ISDN primary route interface

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling

Direct route ISDN primary route interface

Telephonic communications – Telephone line or system combined with diverse electrical... – Credit authorization

Direct telephone dial ordering service

Telephonic communications – Telephone line or system combined with diverse electrical... – Credit authorization

Direct telephone dial ordering service

Telephonic communications – With check operated control

Directed call return service

Telephonic communications – Centralized switching system – Call distribution to operator

Directing contacts between an end user and a contact center...