"PA Advisors, LLC is an arm of Erich Spangenberg’s patent-holding empire. Its job is to assert U.S. Patent No. 6,199,067, which claims the use of user profiles in Internet search; it was used to sue Google, Yahoo, Facebook, and several other smaller players in November 2007. [full PA Advisors docket] On Friday, Law360 reported that the suit was dismissed against Facebook; and remarkably, a Facebook spokesman said that no payment at all was made to Spangenberg. That’s pretty unusual in a case brought by a patent-holding company."