Earlier quoted context omitted.
Apple vs Samsung et al. Issuing patents on silly things like slide to unlock and mag lock even tho those functions existed before Apple has ever used them? Heck I'm surprised they haven't sue every kitchen appliance in Asia for violating their maglock patent.... Heck the first apple iPhone GUI related suit against Samsung was field before the first iPhone was even on the market.
Can you provide an example of slide to unlock before the iPhone? Also, I (personally) feel that maglock for a power cable is very different from maglock for a refrigerator. (A ticket terminal and a vending machine are very different devices covered by different patents even if they both utilize the same basic mechanisms.)
http://9to5mac.com/2011/10/25/slide-to-unlock-patented/
But the point is, it is a very trivial way of interacting with a touchscreen. It is, in fact, one of the few ways one can interact with a touchscreen.