04005428 is referenced by 22 patents and cites 1 patents.

Coded messages, for use in the remote control of equipment for example, are transmitted and received in a manner in which substantially precludes unauthorized or accidental activation of a control associated with the receiving means. This secure communication is accomplished by generation of a plurality of carrier frequencies in a predetermined sequence and by the modulation of each carrier frequency in accordance with a digital code. The receiving means, which is initially tuned to receive the first carrier in a transmission sequence, detects and decodes the received signals and stores the decoded message whereby equipment to be controlled may be responsive to the entire received message; the receiver being retuned to another carrier after each bit of a coded message is detected.

Title
Secure remote control communication systems
Application Number
5/577876
Publication Number
4005428
Application Date
May 15, 1975
Publication Date
January 25, 1977
Inventor
Jerry P Graham
Fairfax
VA, US
Assignee
Sound Technology
CT, US
IPC
H04B 7/00
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