73634403
Dec 5, 1986
Aug 11, 1987
DATA ENTRY TERMINALS AND KEYBOARDS TO PERMIT A TELEVISION VIEWER TO INTERACT IN REAL-TIME WITH TELEVISION BROADCASTS AND TO ORDER MERCHANDISE IN REAL-TIME THROUGH THE TELEVISION MEDIUM AND TRANSFER PAYMENTS THROUGH VIEWER INTERACTIVE BI-DIRECTIONAL COAXIAL CABLE TRANSMISSION DEVICES
Electrical and Scientific Apparatus