Apple has been known recently as a patent troll. They have been flaunting their patents all over the world. Some patents are considered by many as completely absurd. Take ‘Slide to unlock’ as an example. They say that they are the first to invent such a method of unlocking anything. They also filed patents for a rectangular device with a black bezel and a rectangular screen at its center. Pretty much the whole look of the iPad, and any tablet they see that competes with it.
Look out Vegeta you are next!
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Source: Apple sees a future with iGlasses (and also loves patents!)