Goldman Sachs estimate that Microsoft make $3 - $6 in royalties from each Android device sold

"Google's Android could be making arch-rival Microsoft a cool $444 million (£285 million) in patent levies, a Goldman Sachs analyst has estimated, and not much short of what it makes from its own Windows Phone OS.
The company reportedly calculated the sum by totting up the $3-$6 per handset fee it should be making having reached patent deals with a number of handset makers, including HTC and, more recently, Samsung.
It's a small sum when set against the company's estimated $75 billion in annual revenues, but it not bad pocket money considering the underwhelming sums being made by its own mobile OS, Windows phone. According to Business Insider, this will add up to $0.04 to Microsoft's earnings per share."

Source:  Techworld, 3rd October 2011