PTSC Retains Patent Counsel

SAN DIEGO, June 5, 2002 - PTSC (Patriot Scientific Corp.) (OTCBB: PTSC- news) announced today that it has retained the firm of Brown, Martin, Haller and McClain, LLP, a leading patent protection organization. Brown, Martin, Haller and McClain will function as the license enforcement agent for PTSC and will also be instrumental in the construct of a comprehensive legal team of additional law firms in support of Patriot's objectives. Numerous companies are currently using PTSC's patented technology in their microprocessor offerings.

About PTSC: Founded in 1987, PTSC is an Intellectual Property (IP); Integrated Circuit (IC) and systems level embedded engineering company. The Company sells the IGNITE™ processor in silicon both in the United States and abroad. Customers also come to PTSC for product integration and development using the IGNITE technology. For further information on PTSC, visit http://www.ptsc.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.