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Slide to unlock
No patent is permanent. Apple was originally granted a slide-to-unlock patent in Germany in 2011. In February 2012, Apple was awarded a permanent injunction against several Motorola mobile devices for violating the slide-to-unlock patent. But that was delayed in March, pending a court review.
In April, a German court invalidated the patent, ruling that the slide-to-unlock feature lacked the technical innovation to be granted a patent.
In addition, the US Patent and Trademark Office approved Apple's patent application for "ornamental design for a display screen or portion thereof with a graphical user interface". It refers to the rounded corners found at the bottom of locked iOS screens. A judge with the US International Trade Commission (ITC) ruled last October that Samsung had violated Apple's iPhone design patent.
And this legal mess is sure to drag on until a final decision is made.