Microsoft has finally won a long-running battle at the International Trade Commission, one of the most popular venues for the corporate patent wars that have broken out in the last few years.

After Microsoft launched its patents against Motorola, the Illinois company—now under Google's control—launched a variety of counterattacks in both federal courts and the ITC. It filed a case accusing Microsoft's Xbox of violating several of its patents back in 2010. Initially, a judge did find that Microsoft infringed on the patents, which were related to video transmission and compression as well as Wi-Fi. The case went back to the full six-member ITC for reconsideration, and the commission took its time to make a decision.

Now its decision is out, and Microsoft is off the hook for patent infringement. The Redmond software company has been successful in using its patents to force companies producing Android handsets to take licenses, and it hasn't really had to take many blows of its own in the process.

Today's ITC ruling isn't the only patent counter-attack that's gone badly for Motorola lately. Earlier this year, a District Court in Washington denied Motorola the chance to charge Microsoft $4-$6 per Xbox in a separate case over standards-essential patents, reducing the license fees to a mere 3.5¢ per console.

"This is a win for Xbox customers and confirms our view that Google had no grounds to block our products," said a Microsoft spokesperson.

Ars also reached a Motorola spokesperson who understandably had a different take. "We're disappointed with this decision and are evaluating our options."