I highly doubt the US will get involved. Firstly there is no unfair trade going on, intellectual property is a very respected idea internationally, and on the contrary there is no such thing as "too much" of it, only too little (in regards to trade agreements). If Germany is selectively applying their IP laws to benefit domestic industry, thats different. But having strict IP laws is fine.
Germany has intellectual property laws that must be followed, and Microsoft violated them. If they want to commit IP theft they have no business doing business in Germany. And using the property of Motorola without a license is IP theft. The only way to get a license is to agree to Motorola's terms. Microsoft has not done this, and yet continue to use Motorola's IP without permission (for profit even!).
I can't decide to buy Windows for $5 because I think it is a fair price, I can only buy it at what Microsoft sells it for. Likewise, Microsoft must pay whatever Motorola wants, or cease violating their patents. They also have to pay for damages they caused while they were in violation of Motorola's IPR.
