For more than three years now, Microsoft has held to the line that it has loads of patents that are infringed by Google's Android operating system. "Licensing is the solution," wrote the company's head IP honcho in 2011, explaining Microsoft's decision to sue Barnes & Noble's Android-powered Nook reader.
Microsoft has revealed a few of those patents since as it has unleashed litigation against Android device makers. But for the most part, they've remained secret. That's led to a kind of parlor game where industry observers have speculated about what patents Microsoft might be holding over Android.
That long guessing game is now over. A list of hundreds of patents that Microsoft believes entitle it to royalties over Android phones, and perhaps smartphones in general, has been published on a Chinese language website. The patents Microsoft plans to wield against Android describe a range of technologies. They include lots of technologies developed at Microsoft, as well as patents that Microsoft acquired by participating in the Rockstar Consortium, which spent $4.5 billion on patents that were auctioned off after the Nortel bankruptcy.