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April 20, 2009
FEDERAL COURT IN TEXAS DISMISSES PATENT INFRINGEMENT ACTION FILED AGAINST DSC & ADT

For Immediate Release

FEDERAL COURT IN TEXAS DISMISSES PATENT INFRINGEMENT ACTION FILED AGAINST DSC & ADT

Court Finds Paradox Patent Not Infringed

Concord, Canada, & Boca Raton, U.S., April 20, 2009 – DSC, the manufacturer and supplier of home security products in more than 140 countries today announced that it has prevailed in a major lawsuit in U.S. District Court in the Eastern District of Texas, involving certain legacy DSC alarm panels. ADT, a sister company under Tyco International, also announced the dismissal of a similar lawsuit brought against them as a distributor and installer of these DSC security products.

 The lawsuit involved certain alarm control panels manufactured by DSC for ADT and other DSC customers. District Court Judge T. John Ward dismissed the patent infringement action concluding that no reasonable jury could find that DSC infringed Paradox's asserted patent based on the evidence of record. Judge Ward's ruling follows closely on the heels of a March 12, 2009, decision by the Federal Court of Canada, which found Paradox's related Canadian patents to be invalid.

Rob Guttentag, president of DSC, commented on the decision by saying: “We are extremely pleased with this decision. DSC prides itself on the innovation and quality of its products as well as our ethical approach to conducting business. We had always maintained that Paradox’s patents had serious deficiencies and that our products did not infringe.”

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Contact:
Denise Bruley, Communications & Public Relations Manager
DSC
(905) 760-3000, ext. 2414
dbruley@tycoint.com

About DSC
DSC provides security professionals with products of superior quality and performance in more than 140 countries worldwide. They include alarm control panels, keypads, user interfaces, detection devices, alarm communication products, structured wiring and industry-leading alarm monitoring technology. More information on DSC can be found at www.dsc.com.

About Tyco International
Tyco International (NYSE: TYC) is a diversified, global company that provides vital products and services to customers in more than 60 countries. Tyco is a leading provider of security products and services, fire protection and detection products and services, valves and controls, and other industrial products. Tyco had 2008 revenue of more than $20 billion and has more than 110,000 employees worldwide. More information on Tyco can be found at www.tyco.com.

About ADT Security Services
ADT Security Services is a unit of Tyco International and part of ADT Worldwide, the world’s largest security provider. In North America, ADT provides electronic security services to nearly five million commercial, government and residential customers. ADT's total security solutions include intrusion, fire protection, video systems, access control, critical condition monitoring, home health
services, electronic article surveillance, radio frequency identification (RFID) and integrated systems. More ADT information is at
http://www.adt.com

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