The following link shows patent applications where PTSC is involved. It looks like most of them relate to RISC processors and they were filed in 2007 and 2008. I don't know if they have been abandoned. Might be worth an email to IR. They could possibly be an extention of the 549/749??? instruction register patents. http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=0&f=S&l=50&TERM1=Patriot+Scientific&FIELD1=&co1=AND&TERM2=&FIELD2=&d=PG01