An Apple patent for the Digital Crown unveiled on Apple Watch has surfaced in Europe, and Patently Apple has published details and images. Among other things, the patent covers, "an apparatus for an electronic device that provides haptic feedback by controlling an application of friction to a rotary input control with a shaft." Check out Patently Apple for images and additional details—it's a clear demonstration of how Apple thinks differently about user interface issues. This is something Apple's competitors seem unable to do. Asus, for instance, added a "crown" of its own to the Android-powered ZenWatch 2, but it's little more than a glorified on/off button.
Check It Out: Apple Watch Digital Crown Patent Surfaces in Europe