Data communication apparatus

Data communication apparatus including volatile and non-volatile

Data communication method and apparatus including volatile and n

Data storage apparatus

Data transmission apparatus having abbreviated dialing function

Deformable membrane keypad assembly for public telephones

Determining the manner in which the wires connecting to a base s

Device for indicating a call to an absent subscriber

Device for setting and tone dialing a single telephone number

Dial information storing and redialing method for use in a telep

Dial number generator

Dial signal generator for generating dial pulse signal and dual

Dialer circuit

Dialer for selecting a character

Dialer programming and device with integrated printing process

Dialer programming system and device with integrated printing pr

Dialer programming system and device with integrated printing pr

Dialing apparatus

Dialing apparatus

Dialing apparatus for displaying stored character with reduced k