×

Rolling code security system

  • US 20040066936A1
  • Filed: 09/29/2003
  • Published: 04/08/2004
  • Est. Priority Date: 05/17/1995
  • Status: Active Grant
First Claim
Patent Images

1. A transmitter for sending an encrypted signal to control an device, comprising:

  • means for generating a radio frequency oscillatory signal;

    means for generating a variable binary code;

    means for generating a three-valued or trinary code responsive to the binary variable code; and

    means for modulating the radio frequency oscillatory signal with the trinary code to produce a modulated trinary coded variable radio frequency signal for operation or control of a secure actuator.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×