It seems Apple isn't making many friends over at the patent examiner's office lately - yet another high-profile patent used by the company in litigation has been deemed wholly invalid on a preliminary basis.
The patent in question is often called the "pinch-to-zoom" patent, because that's basically what it patents - a pinch gesture to zoom in on content on a display. This patent had been used successfully by Apple during the first Samsung lawsuit, with numerous (all but two) Samsung devices found to infringe it. The claim (#8) involved in the suit, below (heavily redacted, reformatted):
determining whether the event object invokes a scroll or gesture operation by distinguishing between a single input point applied to the touch-sensitive display that is interpreted as the scroll operation and two or more input points applied to the touch-sensitive display that are interpreted as the gesture operation;
issuing at least one scroll or gesture call based on invoking the scroll or gesture operation;
responding to at least one scroll call, if issued, by scrolling a window having a view associated with the event object;
and responding to at least one gesture call, if issued, by scaling the view associated with the event object based on receiving the two or more input points in the form of the user input.