http://www.theregister.co.uk/2010/07...e_turn_patent/
To be fair, the filing does include one breakthough we haven't yet seen in an ebook reader: the ability to turn a pile-o-pages with one gesture. Microsoft envisions the ability to flip through multiple pages by dragging your finger down the right margin. "Furthermore, the relationship between the speed of the gesture and the resulting speed of the page flipping can be linear, exponential, or any other suitable relationship," the filing notes.