Yes, they did. They essentially created the modern "smart phone" with touch screen and mobile apps. Put it together when Blackberry and it's more "Windows" style interface was popular. They also started mouse based GUI's for PC's and a lot of other stuff that became standard.
The point is that they are now trying to protect their innovative ideas when competitors just want to copy them.
If Samsung has patents that are essential for wireless communications, and there are no way to get around them, then they should already have precedent of licensing for them from other vendors. Apple would at worse just have to pay a reasonable fee and that would not stop Apple from keeping Samsung from infringing on it's patents which are not essential for anything, other than for Samsung to compete against competitors who are more innovative and design their phones better.
From what I understand, you are not allowed to use patents to squelch competition when it comes to implementing standards that all competitors MUST use (FRAND). I don't think this is going to really help Samsung to keep copying Apple without any difficulty.
Samsung doesn't have to use what is essentially Apple's designed interface to make smart phone. Doesn't have to look just like an iPhone either.
They dont HAVE to, but they are FREE too. Just like Apple were free to use a keyboard and a mouse, or a desktop paradigm UI (neither of which are Apple inventions).