The giant Apple from Cupertino brings the 3D touch function to the iPhone 6S. This feature was a hit with users, but the company later stopped it and retained only a 3D touch for the trackpad on their MacBook laptops. It is now said that Apple is returning a 3D touch to the Apple Watch, iPhone and MacBooks.

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According to a recent report, Apple has obtained patents for the next generation of pressure sensors. Earlier this year, there were reports suggesting that Apple could exchange the crown on Apple Watch for new optical sensors. It is also mentioned in patents because it shows that power sensors are designed for devices that cause small shapes, such as the Apple Watch and Apple AirPods.

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Apple's report makes it clear that conventional sensors are "big numbers" and the technology mentioned in the new patents is based on a microelectromechanical fluid that can be pressure-sensitive surfaces.

The patent application even has a picture showing where Apple plans to place the sensor on the Apple Watch. Another patent announces that Apple is working on smart watches for Apple Watch with sensors. According to the report, these "smart zones" are able to control blood pressure and even heart rate.

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The patent also reveals how liquid-based microelectromechanical sensors can be used for iPhone displays and internal trackpads for MacBooks. According to the patent, the sensors can “precisely detect small or gradual changes in force." This, reports suggest, could very well be an explanation of how the next-generation of 3D touch will work.

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While this all looks great, it is unlikely that any of these technologies will hit the market in the very near future. Like many technology vendors, patents are not filed and granted for immediate use, and sometimes granted patents can never be used for a commercial product or service.