A new patent, spotted by Windows United, has revealed that Microsoft has been working on a special hinge that uses liquid to reduce the stress on flexible and foldable displays. This is similar to what Samsung has attempted with its Galaxy Fold model, which didn’t hold up very well, however Microsoft’s patent seems to take that concept and make it more plausible. The liquid can be filled inside cavities around the flexible display to help it bend into different positions. Microsoft’s example shows a device with two separate sides and a flexible OLED display that extends across the whole device. Microsoft has long been focused on complex and impressive hinge work with its Surface devices, and this specific hinge is described in a lot of detail in the patent filing. If this patent works the way they seem to want it to, this could indicate a fantastic return of Microsoft to the mobile market.