The United States Patent and Trademark Office published 41 patents today that it recently awarded to Apple. We've already covered one pertaining to VR headsets, and Patently Apple points us to another worth mentioning related to 3D virtual keyboards.
The patent is titled "Virtual keyboard for a non-tactile three dimensional user interface," and it covers a 3D capturing device that uses cameras to detect hand movements, allowing users to type on a virtual keyboard by simply moving their hands or fingers.