From Ars Technica:
What does that mean? When you buy an Android phone, theres a good chance either the vendor whose name is on the device or one of the manufacturers who contributed hardware to it is paying Microsoft a fee for each sale. Today, Microsoft announced an agreement with Compal, an original design manufacturer that produces smartphones and tablets for third parties and takes in $28 billion in annual revenue. This was the tenth license agreement providing coverage under our patent portfolio for Android mobile phones and tablets, and the ninth in the last four months, Microsoft lawyers Brad Smith and Horacio Gutierrez write in a blog post.Microsoft collects license fees on 50% of Android devices, tells Google to "wake up"