74142648
Feb 27, 1991
Oct 6, 1992
interactive communications system comprising a central unit capable of communicating information via cable TV, radio broadcast or telephone line to remote units, each connected to a monitor used to display information selected by a user keypad
Electrical and Scientific Apparatusmaintenance and installation of custom interactive communication systems made to the order and/or specification of others
Building Construction and Repairdesigning custom interactive communication systems made to the order and/or specification of others
Computer and Scientific