Google ownes Multiple User Face-To-Unlock Patent

Pressed with the latest all patents, it is suitable only recently the Mountain View giant in the news, where he achieved a great purpose. Google has recently won the face-to-open patent that is likely to allow multiple users to a "computer" to share. In theory, operates in a very simple way. The user indicates that your face in the built-in camera in your device to access your personal profile you. Once a user and another wants access to the device, he or she can do the same job.

Source: USPTO