Device to monitor the content and/or display of messages

Device to monitor the content and/or duration of the display of

Device transmitting audio and image information remotely via e-m

Device useful as a master/slave clock for transmitting standard

Devices, methods and softwares for telecommunication service...

Devices, softwares and methods for selectively limiting the...

Devices, softwares and methods for selectively limiting the...

Devices, softwares and methods for selectively limiting the...

Dial inbound meter interface unit (MIU) for automatic meter read

Dial inbound meter interface unit which derives its power from a

Dial inbound meter interface unit which derives power from telep

Dial inbound meter interface unit which uses two elements for co

Dial on demand communication

Dial up telephone conferencing system controlled by an...

Dial verifier, especially for facsimile transmission

Dial-in data transmission system with standby capability

Dial-up line modem directly compatible with mainframe host havin

Dialing plan for special access applications such as telemetry s

Digital communication system using telephone line and...

Digital musicians telephone interface