SAN DIEGO, April 23 /PRNewswire-FirstCall/ -- Patriot Scientific Corporation (OTC Bulletin Board: PTSC - News), 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.