Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
James J. Fitzgibbon0
Bradford L. Farris0
Date of Patent
December 27, 2005
0Patent Application Number
099814330
Date Filed
October 17, 2001
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A rolling code transmitter is useful in a security system for providing secure encrypted RF transmission comprising an interleaved trinary bit fixed code and rolling code. A receiver demodulates the encrypted RF transmission and recovers the fixed code and rolling code. Upon comparison of the fixed and rolling codes with stored codes and determining that the signal has emanated from an authorized transmitter, a signal is generated to actuate an electric motor to open or close a movable barrier.
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