walterbyrd writes "A company called Smartphone Technologies filed the suit last Friday in Texas Eastern District Court accusing the Kindle Fire tablet of violating four of its patents. Smartphone Technologies is owned by Acacia Research, a firm that buys and licenses patents and is seen by many as a patent troll. 'One patent cited in the suit, U.S. Patent No. 6,956,562, simply refers to a method for using a touch screen to enter commands on a handheld computer. Another patent in question relates to a method for storing calendars on a PDA and was initially issued to Palm in 2002.'"