I'll research this company before writing the profile.
Patriot Scientific Corporation (OTC: PTSC) was a Delaware corporation organized March 24, 1992 (a predecessor business dates to 1987), headquartered in Carlsbad/San Diego, California. It was a small, thinly traded OTC Bulletin Board/Pink company — IEEE Spectrum described it in 2004 as a "seven-person firm." It is no longer an IP company: in August 2020 it was reverse-merged with a private biotech, and effective November 30–December 1, 2020 it renamed itself Mosaic ImmunoEngineering Inc., switched its ticker to CPMV, and is now a development-stage cancer-immunotherapy company. Roughly 6 employees are reported; no meaningful revenue.
Operations. Patriot's pre-2020 business was primarily patent licensing, not manufacturing. Its historic product efforts included the ShBoom-derived PSC1000 microprocessor family, the Ignite/Inflame processor designs, data-communications products, and, earlier, ground-penetrating radar — but these generated little revenue. Its principal asset was a co-owned interest in the Moore Microprocessor Patent (MMP) Portfolio: seven U.S. patents (e.g., U.S. 5,809,336 on separate CPU/I/O clocking; 5,784,584; 6,598,148) plus European and Japanese counterparts, jointly held with Technology Properties Ltd. (TPL Group) and inventor Charles H. Moore. The portfolio was commercialized by TPL's Alliacense unit and a 50/50 joint venture (Phoenix Digital Solutions) under a 2005 master agreement that gave TPL exclusive licensing and enforcement rights. Licensing revenue included roughly $24 million collectively from Intel, AMD, and Hewlett-Packard, and licensees eventually numbered in the dozens (Fujitsu, Sony, NEC, Nokia, SanDisk, Casio, and others).
Litigation posture. A hybrid, leaning monetizer. Patriot appears as plaintiff in 3 tracked cases (asserting the MMP patents) and defendant in 2 (declaratory-judgment actions brought by targets). It filed infringement suits in December 2003 in N.D. Cal. (Oakland) against Sony, Fujitsu, Matsushita, NEC, and Toshiba; Intel responded with a DJ suit, and 20 Japanese manufacturers filed five DJ actions. Enforcement then shifted to TPL in the plaintiff-friendly Eastern District of Texas (Marshall, Judge T. John Ward), where the parallel N.D. Cal. actions were stayed.
Notable context. Tracked matters include Technology Properties Ltd. et al. v. Fujitsu (E.D. Tex. 2005), Patriot Scientific v. Sony Electronics (N.D. Cal.), Intel Corp. v. Patriot Scientific, and the Japanese manufacturers' consolidated DJ suits naming Moore. Related MMP litigation continued through HTC Corp. v. Technology Properties Ltd. (N.D. Cal., and an ITC action) and a 2011 settlement resolving Patriot–TPL joint-venture disputes. The legacy IP business was wound into the inactive subsidiary Patriot Data Solutions Group.