Patriot Scientific Notifies More Than 150 Companies of Patent Portfolio Infringement

SAN DIEGO, April 23 /PRNewswire-FirstCall/ -- Patriot Scientific Corporation (OTC Bulletin Board: PTSC), a developer and owner of core microprocessor technologies, announced today that it has sent notification to more than 150 additional companies of potential infringement of its U.S. Patent 5,809,336. The companies are among the world's largest electronics firms in the semiconductor, communications equipment, computer hardware, electronic instruments, computer peripherals, scientific and technical instruments, computer storage, computer networks and office equipment business segments.

Dr. Patrick Nunally, chief technical officer of Patriot Scientific, said, "The widespread use of U.S. 5,809,336 is becoming increasingly apparent across multiple industries. The mechanisms disclosed are essential to the operation of thousands of products. We believe that each of these violates PTSC's rights."

The notifications are intended to protect Patriot Scientific's patent rights. Patriot previously announced lawsuits filed against Sony, Fujitsu, Toshiba, NEC and Matsushita. The initial filings seek damages in excess of several hundred million dollars.

Patriot Scientific's patents describe the principal means used by the microprocessor industry to increase the internal operating speed of modern microprocessors. Patriot Scientific's patent portfolio encompasses the fundamental workings of well over $18 billion dollars worth of microprocessors sold in the United States last year. From the time the patents were issued, the company estimates that over $150 billion dollars worth of microprocessors have made use of Patriot Scientific's technology.

The company believes that significant segments of the electronics industry are currently benefiting from technology owned by Patriot Scientific and that microprocessors operating at speeds above 110 - 120 MHz violates portions of Patriot Scientific's patent portfolio.

An investment profile on Patriot Scientific may be found at http://www.hawkassociates.com/patriot/profile.htm.

About Patriot Scientific

Patriot Scientific is an intellectual property company developing and marketing innovative and proprietary semiconductor technologies into the fast- growing hand held wireless and smart card markets. The company's portfolio of patents encompasses what is believed to be fundamental microprocessor technology and includes additional patents pending to protect its technology and architecture. For more information please visit Patriot Scientific online at http://www.ptsc.com

For investor relations information contact Frank Hawkins or Julie Marshall, Hawk Associates, at (305) 852-2383. Email: info@hawkassociates.com For Patriot Scientific information contact Lowell Giffhorn at (858) 674-5018. Detailed information about Patriot Scientific can be found on the website http://www.ptsc.com. Copies of Patriot Scientific press releases, current price quotes, stock charts and other valuable information for investors may be found on the websites http://www.hawkassociates.com and http://www.hawkmicrocaps.com.

Safe Harbor statement under the Private Securities Litigation Reform Act of 1995: Statements in this news release looking forward in time involve risks and uncertainties, including the risks associated with the effect of changing economic conditions, trends in the products markets, variations in the company's cash flow, market acceptance risks, technical development risks, seasonality and other risk factors detailed in the company's Securities and Exchange Commission filings.

SOURCE Patriot Scientific Corporation