Back in February of 2010, Microsoft applied for a number of patents related to touchscreen gestures on a tablet. Many of them concern a dual-screen device, conjuring images of the once highly-anticipated Courier slate. The others focus mainly on bezel gestures. Those patents have gone public now, though they have not in fact been granted yet.
Saturday, August 27, 2011
Microsoft Patenting Multi-Screen, Multi-Touch Gestures - The Washington Post: