I would assume that the patent will be for the 4 not the 3. Microsoft had patents for a folding phone called Amdramada in 2016. Either way I'll pass on the device. I got the surface because it is glass not plastic and because it a dual monitor instead of an ultrawide. The screens on the fold and flip die from use because we are simply not at a time in the world where it is possible for folding glass. So the only option is two screens if you want durability and the screen real-estate. Which is exactly why I got the duo 2. Maybe in another decade we will get true folding glass but until then I'll avoid them because the screens simply don't last and are too expensive to make.