Apple has won a Patent for integrating Touch ID into future versions of iPhone and Apple Watch using new Beamforming Technology
Today the U.S. Patent and Trademark Office officially granted Apple a patent that relates to various methods of implementing Touch ID on both future iPhones and Apple Watch. Technically, the patent covers digital acoustic imaging systems configured for use through an exterior surface having an arbitrary profile (e.g., curved, planar, and so on) of a portable electronic device.
Source: patentlyapple.com