Companies such as ARM and Tensilica are less enthusiastic. “It’s a very particular form of high speed clocks which people have said are very rarely used in actual designs,” said Chris Rowen, CEO of Tensilica and one of the founders of MIPS Technologies who worked on the original RISC technology at Stanford University. “I don’t think these patents are very fundamental at all.”
“We spent a lot of effort looking at the patents and we are quite happy that we don’t infringe,” said Mike Muller, chief technology officer and one of the founders of processor designer ARM.
http://embeddedblog.blogspot.com/2006/11/spammers-target-patriot-scientific.html