Acacia Technologies Initiates Patent Infringement Lawsuit against Intel and Texas Instruments

NEWPORT BEACH, Calif.--(BUSINESS WIRE)--April 19, 2005--Acacia Research Corporation (Nasdaq:ACTG)(Nasdaq:CBMX) announced today that Microprocessor Enhancement Corporation, a wholly owned subsidiary that is part of the Acacia Technologies group, a leader in technology licensing, has filed a patent infringement lawsuit in the District Court for the Central District of California against Intel Corporation and Texas Instruments Corporation.

The lawsuit alleges patent infringement by Intel's Itanium(R) line of microprocessors, and certain series of digital signal processors sold by Texas Instruments. Intel does not break out individual chip sales, but analysts have predicted that sales of Itanium processors will reach several billion dollars a year by 2007.

Microprocessor Enhancement Corporation's patent generally relates to an architecture employed in advanced pipeline processors. This architecture allows for conditional execution of processor instructions, and a later determination of whether the instructions executed should be written back to memory. By conditionally executing instructions in this architecture, significant improvements in processor speed can be achieved. Certain pipelined processor manufacturers are adopting this method of processing to improve processor speed.

ABOUT ACACIA RESEARCH CORPORATION

Acacia Research Corporation comprises two operating groups, Acacia Technologies group and CombiMatrix group.

The Acacia Technologies group develops, acquires, and licenses patented technologies. Acacia controls 29 patent portfolios, which include 127 U.S. patents, and certain foreign counterparts, covering technologies used in a wide variety of industries including audio/video enhancement & synchronization, broadcast data retrieval, computer memory cache coherency, credit card fraud protection, database management, data encryption & product activation, digital media transmission (DMT(R)), digital video production, dynamic manufacturing modeling, enhanced Internet navigation, image resolution enhancement, interactive data sharing, interactive television, Internet access redirection, interstitial Internet advertising, microprocessor enhancement, multi-dimensional bar codes, network data storage, resource scheduling, rotational video imaging and spreadsheet automation.

The CombiMatrix group is developing a platform technology to rapidly produce customizable arrays, which are semiconductor-based tools for use in identifying and determining the roles of genes, gene mutations and proteins. The CombiMatrix's group's technology has a wide range of potential applications in the areas of genomics, proteomics, biosensors, drug discovery, drug development, diagnostics, combinatorial chemistry, material sciences and nanotechnology.

Acacia Research-Acacia Technologies (Nasdaq:ACTG) and Acacia Research-CombiMatrix (Nasdaq:CBMX) are both classes of common stock issued by Acacia Research Corporation and are intended to reflect the performance of the respective operating groups and are not issued by the operating groups.

Information about the Acacia Technologies group and the CombiMatrix group is available at www.acaciaresearch.com.

Safe Harbor Statement under the Private Securities Litigation Reform Act of 1995:

This news release contains forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. These statements are based upon our current expectations and speak only as of the date hereof. Our actual results may differ materially and adversely from those expressed in any forward-looking statements as a result of various factors and uncertainties, including the recent economic slowdown affecting technology companies, our ability to successfully develop products, rapid technological change in our markets, changes in demand for our future products, legislative, regulatory and competitive developments and general economic conditions. Our Annual Report on Form 10-K, recent and forthcoming Quarterly Reports on Form 10-Q, recent Current Reports on Forms 8-K and 8-K/A, and other SEC filings discuss some of the important risk factors that may affect our business, results of operations and financial condition. We undertake no obligation to revise or update publicly any forward-looking statements for any reason.