Your statement "Given that there is little evidence of a clean room reverse engineering approach by Google when it comes to Android, it is unsurprising that big

Your statement "Given that there is little evidence of a clean room reverse engineering approach by Google when it comes to Android, it is unsurprising that big players suspect patent infringement..." is a non sequitur. Clean room reverse engineering is a technique to avoid copyright and trade secret infringements. Patents cannot be avoided by clean room reverse engineering. http://en.wikipedia.org/wiki/Clean_room_design http://en.wikipedia.org/wiki/Clean_room_design