LandOfFree - US Patents - Listing for Telephonic communications

Telephonic communications – Terminal accessory or auxiliary equipment – Locking device

Locking arrangement for a subscriber terminal device

Telephonic communications – Call or terminal access alarm or control – At substation

Lockout apparatus for controlling communications on a single...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – For detection of eavesdropping device

Lockout device for preventing telephone eavesdropping from an ex

Telephonic communications – Call or terminal access alarm or control – At substation

Lockout telephone

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

Logging calls according to call context

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling

Logging tap for digital telephone lines

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

Logic signal circuit for a releasing relay

Telephonic communications – Centralized switching system – Call distribution to operator

Logical PC agent

Telephonic communications – Substation or terminal circuitry

Long distance bidirectional driver

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

Long distance modem warning

Telephonic communications – Special services – Call diversion

Long distance phone tag service

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

Long distance service bureau

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

Long distance telephone communication system and method

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

Long distance telephone switching system with enhanced subscribe

Telephonic communications – Audio message storage – retrieval – or synthesis

Long distance telephone switching system with enhanced subscribe

Telephonic communications – Audio message storage – retrieval – or synthesis

Long distance telephone switching system with enhanced subscribe

Telephonic communications – Supervisory or control line signaling – Substation originated

Long distance telephonic access assembly and method for...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line

Long-distance transmission system and device

Telephonic communications – Echo cancellation or suppression

Long-haul path length delay estimator and compensator for an...