Apple is facing a second lawsuit over technology used in the iPad. EMG Technology has added the iPad to its previously filed patent infringement lawsuit against Apple, which is currently pending in the U.S. District Court for the Eastern District of Texas.

The suit, which doesn’t go to trial until Sept. 12, 2011, alleges that the touchscreen browser in Apple’s products violate EMG’s patents related to navigating Internet mobile Web sites and applications.

The company alleges Apple’s iPad, iTunes Store, iPhone, iPod Touch and Apple TV all violate its patents. EMG says it filed the patents in question in 1999, years before Apple filed its mobile patents.

EMG’s move came one week after Elan Technologies filed a complaint with the International Trade Commission alleging that Apple’s iPad, iPhone, iPod touch, MacBook and Magic Mouse products violate its patent on multitouch technology.

In late 2008, Elan won a dispute over its multitouch technology when a judge ruled that Synaptics had violated its patent.