walterbyrd writes "Just months after the last nail in SCO's case, and on the same day as Red Hat's brave words about patent intimidation, a company filed the first patent suit against the Linux operating system. IP Innovation LLC filed the claim against Red Hat and Novell over U.S. Patent No. 5,072,412. PJ points out there is prior art here: 'You might recall the patent was used in litigation against Apple in April 2007, and Beta News reported at the time that it's a 1991 Xerox PARC patent. But Ars Technica provided the detail that it references earlier patents going back to 1984.'"