"Examples include the infamous FAT patent, patents on low-level concurrency primitives, and patents on synchronizing calendar clients."
What "patents on low-level concurrency primitives"? Those go back to the 1970s. The Microsoft FAT file system patents have expired. The Microsoft calendar synchronization patent is getting close to expiration.
That, to me, looks like a solution to one of Bloomberg's interview questions, so it's surprising to me that with a 1999 priority date, Microsoft's lawyers did not find enough prior art to keep it from being asserted. (Generally when you assert a patent, if you're smart, you'll conduct another prior art search to make sure it sticks.)
But in general, independent of the quality of the patents themselves, the article [1] indicates that none of those are specific to Windows Phone specifically.
What "patents on low-level concurrency primitives"? Those go back to the 1970s. The Microsoft FAT file system patents have expired. The Microsoft calendar synchronization patent is getting close to expiration.