News wire article from our research archive:
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Illinois Inventors Develop Rolling Code Security System
- Article from:
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US Fed News Service, Including US State News
- Article date:
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August 16, 2008
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Copyright informationCopyright © HT Media Ltd. All Rights Reserved. Provided by ProQuest LLC. (Hide copyright information)
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ALEXANDRIA, Va., Aug. 16 -- Bradford L. Farris of Chicago, and James J. Fitzgibbon of Streamwood, Ill., have developed a transmitter for sending encrypted signal.
According to the U.S. Patent & Trademark Office: "A rolling code transmitter is useful in a security system for providing secure encrypted radio frequency (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 ...
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