Acacia Technologies Purchases 3 Patent Portfolios with 36 Patents Relating to Flash Memory, Computer Graphics and DRAM from Alliance Semiconductor

NEWPORT BEACH, Calif.-- June 29, 2007 --Acacia Research Corporation announced today that Acacia Patent Acquisition Corporation, a wholly owned subsidiary that is part of the Acacia Technologies group, a leader in technology licensing, has purchased 3 patent portfolios, consisting of 36 U.S. patents, covering semiconductor technologies relating to flash memory, computer and gaming console graphics and DRAM.

“These 3 new patent portfolios are a significant addition as we continue to grow our base of future revenues,” commented Paul Ryan, Acacia Chairman and CEO. “Acacia has already begun generating revenues from 25 different licensing programs and we look forward to commencing licensing programs for these important technologies.”

The flash memory portfolio consists of 16 patents relating to the architecture, manufacturing and operation of flash memory, including NOR flash. NOR flash technology is used extensively in cell phones.

The computer and gaming console graphics portfolio includes 14 patents relating to the architecture of graphic systems. The technology has applications in high-end personal computers and gaming consoles.

The DRAM portfolio includes 6 patents relating to circuits and manufacturing of DRAM. DRAM technology is widely used in personal computers and gaming consoles.

Alliance Semiconductor Corporation was a leading provider of high performance memory products for computing, embedded, and consumer markets.

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 74 patent portfolios 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®), digital video production, dynamic manufacturing modeling, enhanced Internet navigation, image resolution enhancement, interactive data sharing, interactive television, laptop docking station connectivity, microprocessor enhancement, multi-dimensional bar codes, resource scheduling, spreadsheet automation, and user activated Internet advertising.

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 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.