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Today the U.S. Patent and Trademark Office officially granted Apple a patent that relates to improving the accuracy of ultrasonic touch sensing and fingerprint imaging on buttons like the iPad Air's Touch ID on the top button as shown in our cover graphic. While the execution of ultrasonic fingerprint imaging on the iPad Air's top button looks simple enough to consumers, the technicalities behind this feature is quite steep.

Today the US Patent & Trademark Office published a patent application from Apple that reveals touch input will be function on metal housings of future devices of Macs, iPhone, iPad, TV, TV remote, HMDs, Trackpads and more using ultrasonic touch sensing 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.