"Software patents are increasingly being used like lottery tickets: If you file enough of them, you’ll eventually have the winning number for litigation. Information Protection and Authentication of Texas (IPAT) has sued a dozen computer makers and some software developers for allegedly violating two security related patents that it holds. IPAT filed a formal complaint in a south Florida district court last Thursday. Some of the defendants are Apple, Dell, HP and Lenovo. It has also separately filed suit against software makers including Microsoft and Symantec in a Texas court."