Patriot Scientific Corporation Announces Licensing Agreement With Sony Corporation

Sony Joins Fujitsu, HP and Casio to Secure Licensing Rights to Widely Used MMP Technologies CARLSBAD, Calif. -- June 5, 2006 -- Patriot Scientific Corporation confirmed today that Sony Corporation has purchased a license to the Moore Microprocessor Patent(TM) (MMP) Portfolio. Sony joins an expanding group of global system manufacturers, including Fujitsu, Hewlett-Packard and Casio Computer that have become MMP Portfolio licensees this calendar year. Terms of the license were not disclosed.

"This is a pivotal time for the MMP licensing program," said David Pohl, Patriot Scientific chairman and CEO. "Adding Sony to our ever-growing number of MMP licensees reinforces the strength of our jointly owned patent portfolio as well as our business and licensing strategy. The MMP Portfolio Licensing Program rewards first movers in their industry sectors with substantial discounts. Sony was successful in achieving this distinct honor."

About Patriot Scientific

Patriot Scientific has emerged as an effective and dynamic intellectual property licensing company, developing and marketing innovative and proprietary semiconductor technologies. The company's portfolio of proprietary designs encompasses what is believed to be fundamental ultra-low-power array microprocessor technology, as well as pending patents designed to protect Patriot's proprietary technology.

Detailed information about Patriot Scientific can be found on at http://www.ptsc.com . Copies of Patriot Scientific press releases, current price quotes, stock charts and other valuable information for investors may be found at http://www.hawkassociates.com and http://www.americanmicrocaps.com . An investment profile on Patriot Scientific may be found at http://www.hawkassociates.com/patriot/profile.php .

About Alliacense

Alliacense(TM) is a TPL Group Enterprise executing best-in-class design and implementation of intellectual property licensing programs. As a cadre of IP licensing strategists, technology experts and experienced business development/management executives, Alliacense focuses on expanding the awareness and value of TPL's intellectual property portfolios. For more information, visit http://www.alliacense.com .

About the Patent Portfolio

The patent portfolio, marketed as the Moore Microprocessor Patent Portfolio, contains intellectual property that is jointly owned by publicly held Patriot Scientific Corporation and the privately held TPL Group. The portfolio encompasses seven U.S. patents as well as their European and Japanese counterparts. Both TPL and Patriot assert that their jointly owned patents protect techniques used in designing microprocessors, microcontrollers, Digital Signal Processors (DSPs), embedded processors and System-on-Chip (SoC) implementations. The MMP Portfolio is exclusively managed by Alliacense, a TPL Group enterprise.