NEWPORT BEACH, Calif.--(BUSINESS WIRE)--May 23, 2006--Acacia Research Corporation (Nasdaq:CBMX - News; Nasdaq:ACTG - News) announced today that its CombiMatrix group has signed a subcontract with Northrop Grumman (NYSE:NOC - News) to develop technology and components for the Handheld Isothermal Silver Standard Sensor (HISSS) program. The Special Project Office of the Defense Advanced Research Projects Agency (DARPA) funds the HISSS program. More information can be obtained on the HISSS program by visiting their website at http://www.darpa.mil/spo/programs/hisss.htm.
