They pour quite a bit of money into their research division, why shouldn't they get a return from that investment? They should get a return. But nothing they c

They pour quite a bit of money into their research division, why shouldn't they get a return from that investment? They should get a return. But nothing they created contributed to Android, so they shouldn't be extorting money from Android vendors. The patents that Microsoft has been willing to assert publicly against Android are dominated by FAT patents which describe a system for working around the limits of Microsoft's own file system. Nobody wants to use Microsoft's file system for its own merits -- plenty of free systems exist that have none of its drawbacks and Android uses them internally. Android uses FAT only to interchange information with Microsoft systems and others based on their backwards filesystem. The patent system has been abused to allow Microsoft to block compatibility without contributing anything technological. It's a classical failure mode of the patent system which was supposed to promote innovation and publication, not vendor lock in.